{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.4.52"
              },
              {
                "introduced": "6.0.0"
              },
              {
                "fixed": "6.4.40"
              },
              {
                "introduced": "7.0.0"
              },
              {
                "fixed": "7.4.12"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.12"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "355f32f4318c962842f016eabd0966fde739f6fc"
            },
            {
              "introduced": "6530589fc40cdceda230fb6a69173ce52fa8b5ca"
            },
            {
              "fixed": "816860d96c4fb7ffd7708ae0531ea6e5a1190773"
            },
            {
              "introduced": "f84d7d3c93e6a884908402775199b1f7d55c7be1"
            },
            {
              "fixed": "1fc7ca636cbd2cad29b42cc13c9fd0c681c6efee"
            },
            {
              "introduced": "bea6dc79db4d95c34b77ec27273d812aa64d65be"
            },
            {
              "fixed": "d776945b2dc41c0e609c56c1ef69863ab56856ed"
            }
          ],
          "repo": "https://github.com/symfony/security-http",
          "type": "GIT"
        },
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.4.52"
              },
              {
                "introduced": "6.0.0"
              },
              {
                "fixed": "6.4.40"
              },
              {
                "introduced": "7.0.0"
              },
              {
                "fixed": "7.4.12"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.12"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "eabc5f9ed7831fe6de8d609c5ebc29aed1f8ef8f"
            },
            {
              "introduced": "aa4e97099b5a67bdc9f2387fe8d099f5c712f81c"
            },
            {
              "fixed": "95a951788e30c45356278f4e4472cbbf552d0eb9"
            },
            {
              "introduced": "d78c5f403d7ee794993660b1d5155536edd36fc1"
            },
            {
              "fixed": "275f5cbccbcc50205206f05e599c4f57009aadb8"
            },
            {
              "introduced": "2e913a829cfbbf9cb38b321bdff1806b44b192eb"
            },
            {
              "fixed": "06d3b2c9a8aeb5d8493738cc51e24f6a1215827c"
            },
            {
              "fixed": "59ef484029601a7af06f5e06c6ed921fdcea5a0d"
            }
          ],
          "repo": "https://github.com/symfony/symfony",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-ph86-p8f6-f9r2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-290"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45063.json"
  },
  "details": "Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, X509Authenticator extracts the user identifier from $_SERVER['SSL_CLIENT_S_DN'] with an unanchored regex that matches emailAddress= anywhere in the distinguished name, allowing an attacker with a trusted certificate containing emailAddress=victim inside another RDN value such as CN to authenticate as the victim. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.",
  "id": "CVE-2026-45063",
  "modified": "2026-07-17T03:41:46.354037682Z",
  "published": "2026-07-14T18:28:22.074Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v5.4.52"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v6.4.40"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v7.4.12"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v8.0.12"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45063.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-ph86-p8f6-f9r2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45063"
    },
    {
      "type": "FIX",
      "url": "https://github.com/symfony/symfony/commit/59ef484029601a7af06f5e06c6ed921fdcea5a0d"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator"
}