{"id":"CVE-2026-45074","aliases":["GHSA-j8gj-9rm5-4xhx"],"url":"https://o3.security/vulnerability/CVE-2026-45074","summary":"Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay","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.","published":"2026-07-14T17:49:24.895Z","modified":"2026-08-12T03:51:16.740644872Z","cvss":null,"epss":{"score":0.00413,"percentile":0.34419,"asOf":"2026-08-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"symfony/security-http","fixedVersion":"7.4.12"},{"ecosystem":"Packagist","name":"symfony/security-http","fixedVersion":"8.0.12"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"7.4.12"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"8.0.12"}],"fix":{"url":"https://github.com/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d541","label":"symfony/symfony@5ba145d"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:16.740644872Z"}}