{"id":"CVE-2026-45063","aliases":["GHSA-ph86-p8f6-f9r2"],"url":"https://o3.security/vulnerability/CVE-2026-45063","summary":"Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator","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.","published":"2026-07-14T18:28:22.074Z","modified":"2026-08-12T03:51:45.766195576Z","cvss":null,"epss":{"score":0.0033,"percentile":0.25866,"asOf":"2026-08-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"symfony/security-http","fixedVersion":"5.4.52"},{"ecosystem":"Packagist","name":"symfony/security-http","fixedVersion":"6.4.40"},{"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":"5.4.52"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"6.4.40"},{"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/59ef484029601a7af06f5e06c6ed921fdcea5a0d","label":"symfony/symfony@59ef484"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:45.766195576Z"}}