{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "7.1.0"
              },
              {
                "fixed": "7.4.12"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.12"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "e8637cdef1b58a27878694e1b79ef8bf1b924b4c"
            },
            {
              "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": "7.1.0"
              },
              {
                "fixed": "7.4.12"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.12"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "08964d6da4787cd5f19e60f8aaf41ffd26d6c8c3"
            },
            {
              "fixed": "275f5cbccbcc50205206f05e599c4f57009aadb8"
            },
            {
              "introduced": "2e913a829cfbbf9cb38b321bdff1806b44b192eb"
            },
            {
              "fixed": "06d3b2c9a8aeb5d8493738cc51e24f6a1215827c"
            },
            {
              "fixed": "5ba145dba702404801bdf9e7e8d6df170060d541"
            }
          ],
          "repo": "https://github.com/symfony/symfony",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-j8gj-9rm5-4xhx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-290"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45074.json"
  },
  "details": "Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 7.1.0 until 7.4.12 and 8.0.12, Cas2Handler builds the CAS service parameter from Request::getSchemeAndHttpHost(), which reflects an attacker-controlled Host header when framework.trusted_hosts is not configured; an attacker controlling another application registered with the same CAS server can replay a victim ticket against the Symfony application and authenticate as the victim. This issue is fixed in versions 7.4.12 and 8.0.12.",
  "id": "CVE-2026-45074",
  "modified": "2026-07-17T03:42:02.782693374Z",
  "published": "2026-07-14T17:49:24.895Z",
  "references": [
    {
      "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-2026-45074.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-j8gj-9rm5-4xhx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45074"
    },
    {
      "type": "FIX",
      "url": "https://github.com/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d541"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay"
}