CVE-2024-56522: Tcpdf Project Tcpdf

High severity, CVSS 7.5. 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.

Affected products

• Tcpdf Project Tcpdf: before 6.8.0 (fixed in 6.8.0)

Published 2024-12-27. Last modified 2026-06-17.