CVE-2024-56522

HIGH
Published Dec 27, 2024 Modified Nov 3, 2025 CWE-843

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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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-843 CWE-843

Affected Products

Vendor Product
tcpdf_project tcpdf

References

Frequently Asked Questions

What is CVE-2024-56522? +
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. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2024-56522? +
CVE-2024-56522 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-56522? +
CVE-2024-56522 affects products from tcpdf_project, specifically: tcpdf. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-56522? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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