Vulnerability-Lookup

SUSE-SU-2026:2651-1

Vulnerability from csaf_suse - Published: 2026-06-26 12:18 - Updated: 2026-06-26 12:18

Summary

Security update for haproxy

Severity

Important

Notes

Title of the patch: Security update for haproxy

Description of the patch: This update for haproxy fixes the following issues - CVE-2026-55203: integer overflow vulnerability in the fcgi_conn structure's drl field that allows buffer misparse as new FCGI record headers (bsc#1268557). - CVE-2026-55204: null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c (bsc#1268558).

Patchnames: SUSE-2026-2651,SUSE-SLE-Micro-5.3-2026-2651,SUSE-SLE-Micro-5.4-2026-2651,SUSE-SLE-Micro-5.5-2026-2651,SUSE-SLE-Product-HA-15-SP4-2026-2651,SUSE-SLE-Product-HA-15-SP5-2026-2651

CVE-2026-55203

5.6 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected products

Recommended 18 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2026-55204

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 18 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64	—	Vendor Fix

Threats

Impact important

References

12 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1268557	self
https://bugzilla.suse.com/1268558	self
https://www.suse.com/security/cve/CVE-2026-55203/	self
https://www.suse.com/security/cve/CVE-2026-55204/	self
https://www.suse.com/security/cve/CVE-2026-55203	external
https://bugzilla.suse.com/1268557	external
https://www.suse.com/security/cve/CVE-2026-55204	external
https://bugzilla.suse.com/1268558	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://www.suse.com/support/security/rating/",
      "text": "important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Security update for haproxy",
        "title": "Title of the patch"
      },
      {
        "category": "description",
        "text": "This update for haproxy fixes the following issues\n\n- CVE-2026-55203: integer overflow vulnerability in the fcgi_conn structure\u0027s drl field that allows buffer misparse as\n  new FCGI record headers (bsc#1268557).\n- CVE-2026-55204: null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c (bsc#1268558).\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "SUSE-2026-2651,SUSE-SLE-Micro-5.3-2026-2651,SUSE-SLE-Micro-5.4-2026-2651,SUSE-SLE-Micro-5.5-2026-2651,SUSE-SLE-Product-HA-15-SP4-2026-2651,SUSE-SLE-Product-HA-15-SP5-2026-2651",
        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
        "title": "Terms of use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://www.suse.com/support/security/contact/",
      "name": "SUSE Product Security Team",
      "namespace": "https://www.suse.com/"
    },
    "references": [
      {
        "category": "external",
        "summary": "SUSE ratings",
        "url": "https://www.suse.com/support/security/rating/"
      },
      {
        "category": "self",
        "summary": "URL of this CSAF notice",
        "url": "https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_2651-1.json"
      },
      {
        "category": "self",
        "summary": "URL for SUSE-SU-2026:2651-1",
        "url": "https://www.suse.com/support/update/announcement/2026/suse-su-20262651-1/"
      },
      {
        "category": "self",
        "summary": "E-Mail link for SUSE-SU-2026:2651-1",
        "url": "https://lists.suse.com/pipermail/sle-updates/2026-June/047661.html"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1268557",
        "url": "https://bugzilla.suse.com/1268557"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1268558",
        "url": "https://bugzilla.suse.com/1268558"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2026-55203 page",
        "url": "https://www.suse.com/security/cve/CVE-2026-55203/"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2026-55204 page",
        "url": "https://www.suse.com/security/cve/CVE-2026-55204/"
      }
    ],
    "title": "Security update for haproxy",
    "tracking": {
      "current_release_date": "2026-06-26T12:18:22Z",
      "generator": {
        "date": "2026-06-26T12:18:22Z",
        "engine": {
          "name": "cve-database.git:bin/generate-csaf.pl",
          "version": "1"
        }
      },
      "id": "SUSE-SU-2026:2651-1",
      "initial_release_date": "2026-06-26T12:18:22Z",
      "revision_history": [
        {
          "date": "2026-06-26T12:18:22Z",
          "number": "1",
          "summary": "Current version"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
                "product": {
                  "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
                  "product_id": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64"
                }
              }
            ],
            "category": "architecture",
            "name": "aarch64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.i586",
                "product": {
                  "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.i586",
                  "product_id": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.i586"
                }
              }
            ],
            "category": "architecture",
            "name": "i586"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
                "product": {
                  "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
                  "product_id": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le"
                }
              }
            ],
            "category": "architecture",
            "name": "ppc64le"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
                "product": {
                  "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
                  "product_id": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x"
                }
              }
            ],
            "category": "architecture",
            "name": "s390x"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
                "product": {
                  "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
                  "product_id": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_name",
                "name": "SUSE Linux Enterprise Micro 5.3",
                "product": {
                  "name": "SUSE Linux Enterprise Micro 5.3",
                  "product_id": "SUSE Linux Enterprise Micro 5.3",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:sle-micro:5.3"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "SUSE Linux Enterprise Micro 5.4",
                "product": {
                  "name": "SUSE Linux Enterprise Micro 5.4",
                  "product_id": "SUSE Linux Enterprise Micro 5.4",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:sle-micro:5.4"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "SUSE Linux Enterprise Micro 5.5",
                "product": {
                  "name": "SUSE Linux Enterprise Micro 5.5",
                  "product_id": "SUSE Linux Enterprise Micro 5.5",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:sle-micro:5.5"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "SUSE Linux Enterprise High Availability Extension 15 SP4",
                "product": {
                  "name": "SUSE Linux Enterprise High Availability Extension 15 SP4",
                  "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP4",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:sle-ha:15:sp4"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "SUSE Linux Enterprise High Availability Extension 15 SP5",
                "product": {
                  "name": "SUSE Linux Enterprise High Availability Extension 15 SP5",
                  "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP5",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:sle-ha:15:sp5"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "SUSE Linux Enterprise"
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64 as component of SUSE Linux Enterprise Micro 5.3",
          "product_id": "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.3"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x as component of SUSE Linux Enterprise Micro 5.3",
          "product_id": "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.3"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64 as component of SUSE Linux Enterprise Micro 5.3",
          "product_id": "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.3"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64 as component of SUSE Linux Enterprise Micro 5.4",
          "product_id": "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.4"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x as component of SUSE Linux Enterprise Micro 5.4",
          "product_id": "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.4"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64 as component of SUSE Linux Enterprise Micro 5.4",
          "product_id": "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.4"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64 as component of SUSE Linux Enterprise Micro 5.5",
          "product_id": "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.5"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le as component of SUSE Linux Enterprise Micro 5.5",
          "product_id": "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.5"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x as component of SUSE Linux Enterprise Micro 5.5",
          "product_id": "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.5"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64 as component of SUSE Linux Enterprise Micro 5.5",
          "product_id": "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Micro 5.5"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64 as component of SUSE Linux Enterprise High Availability Extension 15 SP4",
          "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
        "relates_to_product_reference": "SUSE Linux Enterprise High Availability Extension 15 SP4"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le as component of SUSE Linux Enterprise High Availability Extension 15 SP4",
          "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
        "relates_to_product_reference": "SUSE Linux Enterprise High Availability Extension 15 SP4"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x as component of SUSE Linux Enterprise High Availability Extension 15 SP4",
          "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
        "relates_to_product_reference": "SUSE Linux Enterprise High Availability Extension 15 SP4"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64 as component of SUSE Linux Enterprise High Availability Extension 15 SP4",
          "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise High Availability Extension 15 SP4"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64 as component of SUSE Linux Enterprise High Availability Extension 15 SP5",
          "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
        "relates_to_product_reference": "SUSE Linux Enterprise High Availability Extension 15 SP5"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le as component of SUSE Linux Enterprise High Availability Extension 15 SP5",
          "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
        "relates_to_product_reference": "SUSE Linux Enterprise High Availability Extension 15 SP5"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x as component of SUSE Linux Enterprise High Availability Extension 15 SP5",
          "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
        "relates_to_product_reference": "SUSE Linux Enterprise High Availability Extension 15 SP5"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64 as component of SUSE Linux Enterprise High Availability Extension 15 SP5",
          "product_id": "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
        },
        "product_reference": "haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise High Availability Extension 15 SP5"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-55203",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-55203"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure\u0027s drl field that allows buffer misparse as new FCGI record headers. When contentLength is 65535 and paddingLength is 1 or more, the drl field wraps to 0, causing incorrect record consumption and allowing malicious FastCGI backends to desynchronize the FCGI framing parser, potentially causing request routing errors, response smuggling, or memory safety issues.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
          "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
          "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
          "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
          "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
          "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
          "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
          "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-55203",
          "url": "https://www.suse.com/security/cve/CVE-2026-55203"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1268557 for CVE-2026-55203",
          "url": "https://bugzilla.suse.com/1268557"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.6,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-06-26T12:18:22Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-55203"
    },
    {
      "cve": "CVE-2026-55204",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-55204"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "HAProxy through  3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
          "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
          "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
          "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
          "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
          "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
          "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
          "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
          "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
          "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-55204",
          "url": "https://www.suse.com/security/cve/CVE-2026-55204"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1268558 for CVE-2026-55204",
          "url": "https://bugzilla.suse.com/1268558"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise High Availability Extension 15 SP4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise High Availability Extension 15 SP5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.3:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.4:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.aarch64",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.ppc64le",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.s390x",
            "SUSE Linux Enterprise Micro 5.5:haproxy-2.4.22+git0.f8e3218e2-150400.3.28.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-06-26T12:18:22Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-55204"
    }
  ]
}

CVE-2026-55203 (GCVE-0-2026-55203)

Vulnerability from cvelistv5 – Published: 2026-06-18 16:05 – Updated: 2026-06-23 02:04 X_Open Source

Title

HAProxy - Integer Overflow in FCGI Demux Record Length Field

Summary

HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure's drl field that allows buffer misparse as new FCGI record headers. When contentLength is 65535 and paddingLength is 1 or more, the drl field wraps to 0, causing incorrect record consumption and allowing malicious FastCGI backends to desynchronize the FCGI framing parser, potentially causing request routing errors, response smuggling, or memory safety issues.

Severity

9 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/haproxy/haproxy/commit/5985276…	patch
https://www.vulncheck.com/advisories/haproxy-inte…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
haproxy	haproxy	Affected: 0 , ≤ 3.4.0 (semver) Unaffected: 5985276735777634d8c85f1d73bb7764aab0d6dd (git)

Date Public

2026-06-16 00:00

Credits

Tristan Madani (@TristanInSec)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55203",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-23T02:04:34.549032Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-23T02:04:44.933Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "haproxy",
          "repo": "https://github.com/haproxy/haproxy",
          "vendor": "haproxy",
          "versions": [
            {
              "lessThanOrEqual": "3.4.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5985276735777634d8c85f1d73bb7764aab0d6dd",
              "versionType": "git"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:haproxy:aloha:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "3.4.0",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani (@TristanInSec)"
        }
      ],
      "datePublic": "2026-06-16T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure\u0027s drl field that allows buffer misparse as new FCGI record headers. When contentLength is 65535 and paddingLength is 1 or more, the drl field wraps to 0, causing incorrect record consumption and allowing malicious FastCGI backends to desynchronize the FCGI framing parser, potentially causing request routing errors, response smuggling, or memory safety issues."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 9,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-190",
              "description": "Integer Overflow or Wraparound",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-18T16:05:20.100Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/haproxy/haproxy/commit/5985276735777634d8c85f1d73bb7764aab0d6dd"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/haproxy-integer-overflow-in-fcgi-demux-record-length-field"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "title": "HAProxy - Integer Overflow in FCGI Demux Record Length Field",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-55203",
    "datePublished": "2026-06-18T16:05:20.100Z",
    "dateReserved": "2026-06-16T15:53:37.764Z",
    "dateUpdated": "2026-06-23T02:04:44.933Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-55204 (GCVE-0-2026-55204)

Vulnerability from cvelistv5 – Published: 2026-06-18 16:05 – Updated: 2026-06-18 17:26 X_Open Source

Title

HAProxy - NULL Pointer Dereference in hpack_dht_insert Function

Summary

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476 - NULL Pointer Dereference

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/haproxy/haproxy/commit/9a6d1fe…	patch
https://www.vulncheck.com/advisories/haproxy-null…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
haproxy	haproxy	Affected: 0 , ≤ 3.4.0 (semver) Unaffected: 9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513 (git)

Date Public

2026-06-16 00:00

Credits

Tristan Madani (@TristanInSec)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55204",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-18T17:26:27.738915Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-18T17:26:38.498Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "haproxy",
          "repo": "https://github.com/haproxy/haproxy",
          "vendor": "haproxy",
          "versions": [
            {
              "lessThanOrEqual": "3.4.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513",
              "versionType": "git"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:haproxy:aloha:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "3.4.0",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani (@TristanInSec)"
        }
      ],
      "datePublic": "2026-06-16T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "HAProxy through  3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-18T16:05:52.058Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/haproxy/haproxy/commit/9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/haproxy-null-pointer-dereference-in-hpack-dht-insert-function"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "title": "HAProxy - NULL Pointer Dereference in hpack_dht_insert Function",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-55204",
    "datePublished": "2026-06-18T16:05:52.058Z",
    "dateReserved": "2026-06-16T15:53:37.765Z",
    "dateUpdated": "2026-06-18T17:26:38.498Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

SUSE-SU-2026:2651-1

CVE-2026-55203 (GCVE-0-2026-55203)

CVE-2026-55204 (GCVE-0-2026-55204)

Tags

Sightings

Nomenclature