{"id":"CVE-2026-45077","aliases":["GHSA-m7v2-7gxm-vc2v"],"url":"https://o3.security/vulnerability/CVE-2026-45077","summary":"Symfony: Unauthenticated PHP Object Deserialization in MonologBridge server:log Listener","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, the server:log listener (Symfony\\Bridge\\Monolog\\Command\\ServerLogCommand) binds to 0.0.0.0:9911 by default and processes each received frame with unserialize(base64_decode($message)) without authentication, integrity checks, or an allowed_classes allowlist, allowing any reachable host to submit attacker-chosen serialized PHP payloads that can crash the listener and may trigger object-injection gadget effects. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.","published":"2026-07-14T17:46:33.837Z","modified":"2026-08-12T03:51:37.691888665Z","cvss":null,"epss":{"score":0.00447,"percentile":0.3723,"asOf":"2026-08-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"symfony/monolog-bridge","fixedVersion":"5.4.52"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"5.4.52"},{"ecosystem":"Packagist","name":"symfony/monolog-bridge","fixedVersion":"6.4.40"},{"ecosystem":"Packagist","name":"symfony/monolog-bridge","fixedVersion":"7.4.12"},{"ecosystem":"Packagist","name":"symfony/monolog-bridge","fixedVersion":"8.0.12"},{"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/0891b2f293896c488e26943dc034334364b77fc4","label":"symfony/symfony@0891b2f"},"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-2026-45077.json"},{"type":"ADVISORY","url":"https://github.com/symfony/symfony/security/advisories/GHSA-m7v2-7gxm-vc2v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45077"},{"type":"FIX","url":"https://github.com/symfony/symfony/commit/0891b2f293896c488e26943dc034334364b77fc4"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:37.691888665Z"}}