{"action":"Upgrade typo3/cms-core to 10.4.57 or later.","affected":[{"fixed":"10.4.57","introduced":"0"},{"fixed":"11.5.51","introduced":"11.0.0"},{"fixed":"12.4.46","introduced":"12.0.0"},{"fixed":"13.4.31","introduced":"13.0.0"},{"fixed":"14.3.3","introduced":"14.0.0"}],"component":"typo3/cms-core","cve_ids":["CVE-2026-49740"],"ecosystem":"Packagist","epss":0.00215,"exploited":false,"fixed_versions":["10.4.57","11.5.51","12.4.46","13.4.31","14.3.3"],"ghsa_id":"GHSA-c78m-c52x-jgwp","id":"tcs_01M5KF0PW0YS70GAT4JW016H11","modified_at":"2026-09-10T03:51:08.473143340Z","published_at":"2026-06-12T19:09:26Z","references":["https://osv.dev/vulnerability/GHSA-c78m-c52x-jgwp","https://github.com/TYPO3/typo3/security/advisories/GHSA-c78m-c52x-jgwp","https://nvd.nist.gov/vuln/detail/CVE-2026-49740","https://github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7","https://github.com/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-49740.yaml","https://github.com/TYPO3/typo3","https://typo3.org/security/advisory/typo3-core-sa-2026-018"],"severity":{"label":"medium","score":6.3},"sources":[{"source":"osv","source_id":"GHSA-c78m-c52x-jgwp","url":"https://osv.dev/vulnerability/GHSA-c78m-c52x-jgwp"},{"source":"nvd","source_id":"CVE-2026-49740","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49740"}],"summary":"TYPO3 CMS has Insecure Deserialization via Core API"}