CVE-2024-56522
7.5HIGHAn 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: 12/27/2024Updated: 11/3/2025
Description
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.
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Affected Products
tcpdf_projecttcpdf
References
- https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89Patch
- https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0Issue Tracking
- https://tcpdf.orgProduct
- https://www.php.net/manual/en/types.comparisons.phpNot Applicable
- https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html