Vulnerability-Lookup

USN-8523-1 (UBUNTU-CVE-2026-2369)

Vulnerability from osv_ubuntu – Published: 2026-07-09 14:13 – Updated: 2026-07-09 14:13 – Source website

Summary

libsoup2.4 vulnerabilities

Details

Eric Su and Samuel Dainard discovered that libsoup incorrectly handled content with zero-length resources. An attacker could possibly use this issue to trigger a buffer over-read, resulting in information disclosure or a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-2369)

Kona Arctic discovered that libsoup did not properly protect sensitive cookies when establishing HTTPS tunnels through an HTTP proxy. An attacker could possibly use this issue to intercept session cookies, resulting in session hijacking or user impersonation. (CVE-2026-5119)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8523-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-2369	REPORT
	https://ubuntu.com/security/CVE-2026-5119	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-5119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
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            }
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                }
              ]
            },
            {
              "id": "CVE-2026-5119",
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                },
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                }
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                },
                {
                  "score": "medium",
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                }
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              "id": "CVE-2026-5119",
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                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
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                {
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                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
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            {
              "id": "CVE-2026-5119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
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                }
              ]
            }
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        }
      },
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      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
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                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
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            },
            {
              "id": "CVE-2026-5119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
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        "availability": "No subscription required",
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          {
            "binary_name": "gir1.2-soup-2.4",
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          {
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          },
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            "binary_version": "2.74.3-6ubuntu1.7"
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      },
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        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libsoup2.4",
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        "2.74.3-3",
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        "2.74.3-6ubuntu1.4",
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        "2.74.3-6ubuntu1.6"
      ]
    },
    {
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            {
              "id": "CVE-2026-2369",
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                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
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          },
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            "binary_version": "2.74.3-10.1ubuntu4.1"
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        "2.74.3-10.1ubuntu2",
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        "2.74.3-10.1ubuntu4"
      ]
    },
    {
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            {
              "id": "CVE-2026-2369",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gir1.2-soup-2.4",
            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          },
          {
            "binary_name": "libsoup-2.4-1",
            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          },
          {
            "binary_name": "libsoup-gnome-2.4-1",
            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          },
          {
            "binary_name": "libsoup2.4-common",
            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          },
          {
            "binary_name": "libsoup2.4-tests",
            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.74.3-10.1ubuntu5+esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.74.3-10.1ubuntu5+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.74.3-10.1ubuntu4",
        "2.74.3-10.1ubuntu5"
      ]
    }
  ],
  "aliases": [],
  "details": "Eric Su and Samuel Dainard discovered that libsoup incorrectly handled\ncontent with zero-length resources. An attacker could possibly use this\nissue to trigger a buffer over-read, resulting in information disclosure\nor a denial of service. This issue only affected Ubuntu 18.04 LTS,\nUbuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and\nUbuntu 26.04 LTS. (CVE-2026-2369)\n\nKona Arctic discovered that libsoup did not properly protect sensitive\ncookies when establishing HTTPS tunnels through an HTTP proxy. An\nattacker could possibly use this issue to intercept session cookies,\nresulting in session hijacking or user impersonation. (CVE-2026-5119)",
  "id": "USN-8523-1",
  "modified": "2026-07-09T14:13:33Z",
  "published": "2026-07-09T14:13:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8523-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-2369"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5119"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "libsoup2.4 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-2369",
    "UBUNTU-CVE-2026-5119"
  ]
}

UBUNTU-CVE-2026-2369 (CVE-2026-2369)

Vulnerability from osv_ubuntu – Published: 2026-03-19 15:16 – Updated: 2026-09-17 22:22 – Source website

Details

A flaw was found in libsoup. An integer underflow vulnerability occurs when processing content with a zero-length resource, leading to a buffer overread. This can allow an attacker to potentially access sensitive information or cause an application level denial of service.

Severity

6.5 (Medium)


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

9.1 (Critical)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-2369	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-2369	REPORT
	https://ubuntu.com/security/notices/USN-8523-1	ADVISORY

JSON

To clipboard

{
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      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
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        "3.0.7-0ubuntu1+esm8"
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    {
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            "binary_name": "gir1.2-soup-2.4",
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            "binary_name": "libsoup-2.4-1",
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            "binary_name": "libsoup2.4-common",
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      "package": {
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        "name": "libsoup2.4",
        "purl": "pkg:deb/ubuntu/libsoup2.4@2.74.3-6ubuntu1.7?arch=source\u0026distro=noble"
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        "3.4.4-5ubuntu0.7",
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        "availability": "No subscription required",
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      "ecosystem_specific": {
        "binaries": [
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            "binary_name": "gir1.2-soup-3.0",
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            "binary_name": "libsoup-3.0-common",
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      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
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            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          },
          {
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            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          },
          {
            "binary_name": "libsoup-gnome-2.4-1",
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          },
          {
            "binary_name": "libsoup2.4-common",
            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          },
          {
            "binary_name": "libsoup2.4-tests",
            "binary_version": "2.74.3-10.1ubuntu5+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "libsoup2.4",
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            {
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          "type": "ECOSYSTEM"
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      ],
      "versions": [
        "2.74.3-10.1ubuntu4",
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  ],
  "aliases": [],
  "details": "A flaw was found in libsoup. An integer underflow vulnerability occurs when processing content with a zero-length resource, leading to a buffer overread. This can allow an attacker to potentially access sensitive information or cause an application level denial of service.",
  "id": "UBUNTU-CVE-2026-2369",
  "modified": "2026-09-17T22:22:19Z",
  "published": "2026-03-19T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-2369"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-2369"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8523-1"
    }
  ],
  "related": [
    "USN-8523-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-2369"
  ]
}

UBUNTU-CVE-2026-5119 (CVE-2026-5119)

Vulnerability from osv_ubuntu – Published: 2026-03-30 07:15 – Updated: 2026-09-17 22:22 – Source website

Details

A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. A network-positioned attacker or a malicious HTTP proxy can intercept these cookies, leading to potential session hijacking or user impersonation.

Severity

5.9 (Medium)


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

8.2 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-5119	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-5119	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2452932	REPORT
	https://gitlab.gnome.org/GNOME/libsoup/-/issues/502	REPORT
	https://access.redhat.com/security/cve/CVE-2026-5119	REPORT
	https://ubuntu.com/security/notices/USN-8523-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
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      "versions": [
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        "ecosystem": "Ubuntu:Pro:26.04:LTS",
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    }
  ],
  "aliases": [],
  "details": "A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. A network-positioned attacker or a malicious HTTP proxy can intercept these cookies, leading to potential session hijacking or user impersonation.",
  "id": "UBUNTU-CVE-2026-5119",
  "modified": "2026-09-17T22:22:21Z",
  "published": "2026-03-30T07:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5119"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-5119"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452932"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/502"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-5119"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8523-1"
    }
  ],
  "related": [
    "USN-8523-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-5119"
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

USN-8523-1 (UBUNTU-CVE-2026-2369)

UBUNTU-CVE-2026-2369 (CVE-2026-2369)

UBUNTU-CVE-2026-5119 (CVE-2026-5119)

Tags

Sightings

Nomenclature

Related by attack behaviour