Security advisory

{
  "id": "b2472ff36f4949de37b71a1364f55663e3489f176b799984564d2eb65769f4a3",
  "url": "https://osv.dev/vulnerability/CVE-2021-41611",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-41611",
    "summary": "An issue was discovered in Squid 5.0.6 through 5.1.x before 5.2. When validating an origin server or peer certificate, Squid may incorrectly classify certain certificates as trusted. This problem allows a remote server to obtain security trust well improperly. This indication of trust may be passed along to clients, allowing access to unsafe or hijacked services.",
    "evidence": "osv:CVE-2021-41611",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-41611",
      "aliases": [
        "CVE-2021-41611",
        "GHSA-47m4-g3mv-9q5r"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/squid-cache/squid",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1521895e24671463bf590cabcdbd2acf637ed2c1"
                },
                {
                  "fixed": "74f073ecdc41e96dbf68e63550710fed7b8ad2d2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.0.6"
                      },
                      {
                        "fixed": "5.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "SQUID_5_1",
            "SQUID_5_0_7",
            "SQUID_5_0_6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41611.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:01.352612338Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CWQ2WKDWTSO47S3F6XJJ6HGG2ULWEAE4/",
        "https://github.com/squid-cache/squid/security/advisories/GHSA-47m4-g3mv-9q5r"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "35"
                  },
                  {
                    "last_affected": "35"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-41611",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384818,
  "published_at": "2021-10-18T09:15:08.823+00:00"
}