{"id":"CVE-2024-56522","aliases":["GHSA-w95c-7994-ghpr"],"url":"https://o3.security/vulnerability/CVE-2024-56522","summary":"TCPDF has incorrect comparison","details":"An issue was discovered in TCPDF before 6.8.0. unserializeTCPDFtag uses != (aka loose comparison) and does not use a constant-time function to compare TCPDF tag hashes.","published":"2024-12-27T00:00:00Z","modified":"2026-07-15T01:49:22.179851802Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"tecnickcom/tcpdf","fixedVersion":"6.8.0"}],"fix":{"url":"https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89","label":"tecnickcom/TCPDF@d54b97c"},"references":[{"type":"WEB","url":"https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html"},{"type":"WEB","url":"https://tcpdf.org"},{"type":"WEB","url":"https://www.php.net/manual/en/types.comparisons.php"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56522.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56522"},{"type":"FIX","url":"https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:22.179851802Z"}}