Vulnerability-Lookup

ubuntu-cve-2026-33515

Vulnerability from osv_ubuntu

Published

2026-03-26 01:16

Modified

2026-04-13 09:32

Summary

Details

Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero icp_port). This problem cannot be mitigated by denying ICP queries using icp_access rules. Version 7.5 contains a patch.

Severity

6.9 (Medium)


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

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-33515	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-33515	REPORT
	https://www.openwall.com/lists/oss-security/2026/…	REPORT
	https://ubuntu.com/security/notices/USN-8157-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid3",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "squid3",
        "purl": "pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.16+esm6?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.8-1ubuntu16",
        "3.3.8-1ubuntu17",
        "3.5.12-1ubuntu6",
        "3.5.12-1ubuntu7",
        "3.5.12-1ubuntu7.1",
        "3.5.12-1ubuntu7.2",
        "3.5.12-1ubuntu7.3",
        "3.5.12-1ubuntu7.4",
        "3.5.12-1ubuntu7.5",
        "3.5.12-1ubuntu7.6",
        "3.5.12-1ubuntu7.7",
        "3.5.12-1ubuntu7.8",
        "3.5.12-1ubuntu7.9",
        "3.5.12-1ubuntu7.10",
        "3.5.12-1ubuntu7.11",
        "3.5.12-1ubuntu7.12",
        "3.5.12-1ubuntu7.13",
        "3.5.12-1ubuntu7.14",
        "3.5.12-1ubuntu7.15",
        "3.5.12-1ubuntu7.16",
        "3.5.12-1ubuntu7.16+esm1",
        "3.5.12-1ubuntu7.16+esm2",
        "3.5.12-1ubuntu7.16+esm3",
        "3.5.12-1ubuntu7.16+esm4",
        "3.5.12-1ubuntu7.16+esm5",
        "3.5.12-1ubuntu7.16+esm6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid3",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "squid3",
        "purl": "pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.14+esm5?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.23-5ubuntu1",
        "3.5.23-5ubuntu2",
        "3.5.27-1ubuntu1",
        "3.5.27-1ubuntu1.1",
        "3.5.27-1ubuntu1.2",
        "3.5.27-1ubuntu1.3",
        "3.5.27-1ubuntu1.4",
        "3.5.27-1ubuntu1.5",
        "3.5.27-1ubuntu1.6",
        "3.5.27-1ubuntu1.7",
        "3.5.27-1ubuntu1.8",
        "3.5.27-1ubuntu1.9",
        "3.5.27-1ubuntu1.10",
        "3.5.27-1ubuntu1.11",
        "3.5.27-1ubuntu1.12",
        "3.5.27-1ubuntu1.13",
        "3.5.27-1ubuntu1.14",
        "3.5.27-1ubuntu1.14+esm1",
        "3.5.27-1ubuntu1.14+esm2",
        "3.5.27-1ubuntu1.14+esm3",
        "3.5.27-1ubuntu1.14+esm4",
        "3.5.27-1ubuntu1.14+esm5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@4.10-1ubuntu1.13+esm2?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.8-1ubuntu2",
        "4.8-1ubuntu3",
        "4.9-2ubuntu1",
        "4.9-2ubuntu2",
        "4.9-2ubuntu3",
        "4.9-2ubuntu4",
        "4.10-1ubuntu1",
        "4.10-1ubuntu1.1",
        "4.10-1ubuntu1.2",
        "4.10-1ubuntu1.3",
        "4.10-1ubuntu1.4",
        "4.10-1ubuntu1.5",
        "4.10-1ubuntu1.6",
        "4.10-1ubuntu1.7",
        "4.10-1ubuntu1.8",
        "4.10-1ubuntu1.9",
        "4.10-1ubuntu1.10",
        "4.10-1ubuntu1.11",
        "4.10-1ubuntu1.12",
        "4.10-1ubuntu1.13",
        "4.10-1ubuntu1.13+esm1",
        "4.10-1ubuntu1.13+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@5.9-0ubuntu0.22.04.5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.9-0ubuntu0.22.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.13-10ubuntu5",
        "5.2-1ubuntu1",
        "5.2-1ubuntu3",
        "5.2-1ubuntu4",
        "5.2-1ubuntu4.1",
        "5.2-1ubuntu4.2",
        "5.2-1ubuntu4.3",
        "5.7-0ubuntu0.22.04.1",
        "5.7-0ubuntu0.22.04.2",
        "5.7-0ubuntu0.22.04.3",
        "5.7-0ubuntu0.22.04.4",
        "5.9-0ubuntu0.22.04.1",
        "5.9-0ubuntu0.22.04.2",
        "5.9-0ubuntu0.22.04.3",
        "5.9-0ubuntu0.22.04.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@6.14-0ubuntu0.24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14-0ubuntu0.24.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1-2ubuntu1",
        "6.1-2ubuntu2",
        "6.5-1ubuntu1",
        "6.5-1ubuntu2",
        "6.5-1ubuntu3",
        "6.6-1ubuntu4",
        "6.6-1ubuntu5",
        "6.6-1ubuntu5.1",
        "6.10-0ubuntu0.24.04.1",
        "6.13-0ubuntu0.24.04.1",
        "6.13-0ubuntu0.24.04.2",
        "6.13-0ubuntu0.24.04.3",
        "6.14-0ubuntu0.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@6.14-0ubuntu0.25.10.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14-0ubuntu0.25.10.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.13-1ubuntu1",
        "6.13-1ubuntu2",
        "6.13-1ubuntu3",
        "6.13-1ubuntu4",
        "6.13-1ubuntu4.1",
        "6.14-0ubuntu0.25.10.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem cannot be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.",
  "id": "UBUNTU-CVE-2026-33515",
  "modified": "2026-04-13T09:32:07Z",
  "published": "2026-03-26T01:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-33515"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33515"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2026/03/25/4"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8157-1"
    }
  ],
  "related": [
    "USN-8157-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-33515"
  ]
}

CVE-2026-33515 (GCVE-0-2026-33515)

Vulnerability from cvelistv5 – Published: 2026-03-26 00:13 – Updated: 2026-03-26 14:19

Title

Squid has issues in ICP message handling

Summary

Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem cannot be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.

Severity

6.9 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read
CWE-1289 - Improper Validation of Unsafe Equivalence in Input

Assigner

GitHub_M

References

5 references

URL	Tags
https://github.com/squid-cache/squid/security/adv…	x_refsource_CONFIRM
https://github.com/squid-cache/squid/pull/2220	x_refsource_MISC
https://github.com/squid-cache/squid/pull/2220#di…	x_refsource_MISC
https://github.com/squid-cache/squid/commit/8138e…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2026/03/25/4

Impacted products

1 product

Vendor	Product	Version
squid-cache	squid	Affected: < 7.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-03-26T00:24:56.505Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/03/25/4"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33515",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-26T14:19:33.291751Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-26T14:19:39.660Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "squid",
          "vendor": "squid-cache",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem cannot be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1289",
              "description": "CWE-1289: Improper Validation of Unsafe Equivalence in Input",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-26T00:13:51.127Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/squid-cache/squid/security/advisories/GHSA-84p4-hcx7-jj7c",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-84p4-hcx7-jj7c"
        },
        {
          "name": "https://github.com/squid-cache/squid/pull/2220",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/pull/2220"
        },
        {
          "name": "https://github.com/squid-cache/squid/pull/2220#discussion_r2727683637",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/pull/2220#discussion_r2727683637"
        },
        {
          "name": "https://github.com/squid-cache/squid/commit/8138e909d2058d4401e0ad49b583afaec912b165",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/commit/8138e909d2058d4401e0ad49b583afaec912b165"
        }
      ],
      "source": {
        "advisory": "GHSA-84p4-hcx7-jj7c",
        "discovery": "UNKNOWN"
      },
      "title": "Squid has issues in ICP message handling"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33515",
    "datePublished": "2026-03-26T00:13:51.127Z",
    "dateReserved": "2026-03-20T16:59:08.891Z",
    "dateUpdated": "2026-03-26T14:19:39.660Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

usn-8157-1

Vulnerability from osv_ubuntu

Published

2026-04-08 12:37

Modified

2026-06-30 15:54

Summary

squid vulnerabilities

Details

It was discovered that Squid incorrectly handled certain ICP traffic. In environments where ICP support is enabled, a remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or obtain small amounts of sensitive information.

References

URL

Type

	https://ubuntu.com/security/notices/USN-8157-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-32748	REPORT
	https://ubuntu.com/security/CVE-2026-33515	REPORT
	https://ubuntu.com/security/CVE-2026-33526	REPORT

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{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-32748",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33515",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33526",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "5.9-0ubuntu0.22.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@5.9-0ubuntu0.22.04.5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.9-0ubuntu0.22.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.13-10ubuntu5",
        "5.2-1ubuntu1",
        "5.2-1ubuntu3",
        "5.2-1ubuntu4",
        "5.2-1ubuntu4.1",
        "5.2-1ubuntu4.2",
        "5.2-1ubuntu4.3",
        "5.7-0ubuntu0.22.04.1",
        "5.7-0ubuntu0.22.04.2",
        "5.7-0ubuntu0.22.04.3",
        "5.7-0ubuntu0.22.04.4",
        "5.9-0ubuntu0.22.04.1",
        "5.9-0ubuntu0.22.04.2",
        "5.9-0ubuntu0.22.04.3",
        "5.9-0ubuntu0.22.04.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-32748",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33515",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33526",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@6.14-0ubuntu0.24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14-0ubuntu0.24.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1-2ubuntu1",
        "6.1-2ubuntu2",
        "6.5-1ubuntu1",
        "6.5-1ubuntu2",
        "6.5-1ubuntu3",
        "6.6-1ubuntu4",
        "6.6-1ubuntu5",
        "6.6-1ubuntu5.1",
        "6.10-0ubuntu0.24.04.1",
        "6.13-0ubuntu0.24.04.1",
        "6.13-0ubuntu0.24.04.2",
        "6.13-0ubuntu0.24.04.3",
        "6.14-0ubuntu0.24.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-32748",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33515",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-33526",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
                  "type": "CVSS_V4"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.25.10.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@6.14-0ubuntu0.25.10.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14-0ubuntu0.25.10.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.13-1ubuntu1",
        "6.13-1ubuntu2",
        "6.13-1ubuntu3",
        "6.13-1ubuntu4",
        "6.13-1ubuntu4.1",
        "6.14-0ubuntu0.25.10.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Squid incorrectly handled certain ICP traffic. In\nenvironments where ICP support is enabled, a remote attacker could use this\nissue to cause Squid to crash, resulting in a denial of service, or obtain\nsmall amounts of sensitive information.",
  "id": "USN-8157-1",
  "modified": "2026-06-30T15:54:55Z",
  "published": "2026-04-08T12:37:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8157-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-32748"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-33515"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-33526"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "squid vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-32748",
    "UBUNTU-CVE-2026-33515",
    "UBUNTU-CVE-2026-33526"
  ]
}

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.

Action not permitted

ubuntu-cve-2026-33515

Vulnerability from osv_ubuntu

CVE-2026-33515 (GCVE-0-2026-33515)

usn-8157-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature