CVE-2024-56522

7.5 highEPSS 0.6%

High (7.5) in tcpdf project tcpdf. EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-31)
CWE: CWE-843
Published: 2024-12-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

tcpdf_project:tcpdf

References

https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89
https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
https://tcpdf.org
https://www.php.net/manual/en/types.comparisons.php
https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html

Check your stack JSON