{"id":"CVE-2026-77138","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77138","generatedAt":"2026-10-28T03:25:49.731Z","title":"The extension fails to safely process untrusted client input of an attacker-controlled cookie directly to PHP's unserialize().","description":"The extension fails to safely process untrusted client input of an attacker-controlled cookie directly to PHP's unserialize(). A remote, unauthenticated attacker can supply a crafted serialized payload to trigger PHP Object Injection, leading to Remote Code Execution on the TYPO3 server.","published":"2026-08-25T09:17:34.000Z","lastModified":"2026-09-28T23:10:00.000Z","status":"Deferred","sourceIdentifier":"f4fb688c-4412-4426-b4b8-421ecf27b14a","cvss":{"version":"4.0","score":9.3,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-502"],"affected":[],"epss":{"score":0.00716,"percentile":0.53499,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://typo3.org/security/advisory/typo3-ext-sa-2026-014","source":"f4fb688c-4412-4426-b4b8-421ecf27b14a"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77138","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}