TI-2024-37409 Aliases CVE-2024-56522 GHSA-w95c-7994-ghpr

Type confusion in Tecnick tcpdf

MEDIUM 40CWE-843Published 2024-12-27 · Updated 2025-11-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00614 49th percentileScored 2026-11-07

Fix Fixed tcpdf (tecnick): 6.8.0tecnickcom/tcpdf (Packagist): 6.8.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Tecnick	tcpdf	before 6.8.0	6.8.0	Patch available	CNA
—	tecnickcom/tcpdf (Packagist)	before 6.8.0	6.8.0	Patch available	GHSA-w95c-7994-ghpr

tcpdf VendorTecnick Affected before 6.8.0 Fixed in 6.8.0 Patch available CNA
tecnickcom/tcpdf (Packagist) Vendor— Affected before 6.8.0 Fixed in 6.8.0 Patch available GHSA-w95c-7994-ghpr

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:tcpdf_project:tcpdf::::::::	before 6.8.0	Vulnerable	Tcpdf Project

cpe:2.3:a:tcpdf_project:tcpdf:*:*:*:*:*:*:*:* Versions before 6.8.0 Vulnerable ·Tcpdf Project

Remediation

Fix · CNA tcpdf (tecnick) Fixed in 6.8.0
Fix · GHSA-w95c-7994-ghpr tecnickcom/tcpdf (Packagist) Fixed in 6.8.0 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2024-12-27
tecnick tcpdf 6.8.0
5 records Highest priority Priority MEDIUM 4 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2024-37408 Improper certificate validation in Tecnick tcpdfPriority MEDIUM 50
- TI-2024-37414 Cross-site scripting in Tecnick tcpdfPriority MEDIUM 40
- TI-2024-37406 Cross-site scripting in Tecnick tcpdfPriority MEDIUM 40
Show all 5 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2024-56522
2026-10-03 Alias added: GHSA-w95c-7994-ghpr

References

Patch 1

https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2024-56522

Other 5

TI-2018-12189 An issue was discovered in TCPDF before 6.2.22. CVSS 3.0CRITICAL 9.8
TI-2026-03616 Tecnick TCExam Group tce_edit_group.php cross site scripting CVSS 4.0MEDIUM 4.8
TI-2024-37408 Improper certificate validation in Tecnick tcpdf CVSS 3.1CRITICAL 9.8
TI-2024-32179 Tecnick TCExam – CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') CVSS 3.1CRITICAL 9.8
TI-2021-03414 When installed following the default/recommended settings, TCExam <= 14.8.1 allowed… CVSS 3.1HIGH 7.5
TI-2025-16961 Tecnick – CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') CVSS 3.1HIGH 8.8

See all 36 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences