{"id":"CVE-2024-56521","aliases":["GHSA-9mgx-552f-59p6"],"url":"https://o3.security/vulnerability/CVE-2024-56521","summary":"TCPDF missing certificate validation","details":"An issue was discovered in TCPDF before 6.8.0. If libcurl is used, CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER are set unsafely.","published":"2024-12-27T00:00:00Z","modified":"2026-08-12T03:51:17.897741069Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"tecnickcom/tcpdf","fixedVersion":"6.8.0"}],"fix":{"url":"https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554","label":"tecnickcom/TCPDF@aab43ab"},"references":[{"type":"WEB","url":"https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0"},{"type":"WEB","url":"https://tcpdf.org"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56521.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56521"},{"type":"FIX","url":"https://github.com/tecnickcom/TCPDF/commit/aab43ab0a824e956276141a28a24c7c0be20f554"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:17.897741069Z"}}