{"id":"CVE-2026-49740","aliases":["GHSA-c78m-c52x-jgwp"],"url":"https://o3.security/vulnerability/CVE-2026-49740","summary":"TYPO3 CMS - Insecure Deserialization in Core API","details":"### Problem\nTYPO3's cache frontend (`VariableFrontend`) and persistent key-value store (`Registry`) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry database table) could inject a crafted serialized payload to trigger PHP Object Injection, potentially exploiting a gadget chain to achieve Remote Code Execution or other high-impact effects.\n\nExploiting this vulnerability requires direct local write access to the storage, such as the SQL database or file system.\n\n### Solution\nUpdate to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described.\n\n### Credits\nTYPO3 CMS thanks “z3rco”, Chowdhury Faizal Ahammed, Rick Larabee, Vitaly Simonovich, Nozomu Sasaki, Mert Akdag, “tikket”, Shafi Almutairi for reporting this issue, and to TYPO3 core & security team member Oliver Hader for fixing it.\n\n### Resources\n* [TYPO3-CORE-SA-2026-018](https://typo3.org/security/advisory/typo3-core-sa-2026-018)","published":"2026-06-09T10:53:55.777Z","modified":"2026-10-21T02:58:23.534436101Z","cvss":null,"epss":{"score":0.00215,"percentile":0.11804,"asOf":"2026-09-01"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"10.4.57"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"11.5.51"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"12.4.46"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"13.4.31"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"14.3.3"}],"fix":{"url":"https://github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7","label":"TYPO3/typo3@48bcf24"},"references":[{"type":"WEB","url":"https://packagist.org"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49740.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49740"},{"type":"ADVISORY","url":"https://typo3.org/security/advisory/typo3-core-sa-2026-018"},{"type":"FIX","url":"https://github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7"},{"type":"FIX","url":"https://github.com/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02"},{"type":"PACKAGE","url":"https://github.com/TYPO3/typo3"},{"type":"WEB","url":"https://github.com/TYPO3/typo3/security/advisories/GHSA-c78m-c52x-jgwp"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-49740.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:58:23.534436101Z"}}