An issue was discovered in tc-lib-pdf-font before 2.6.4, as used in TCPDF before 6.8.0…
Priority LOW 39Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.
Summary
An issue was discovered in tc-lib-pdf-font before 2.6.4, as used in TCPDF before 6.8.0 and other products. Fonts are mishandled, e.g., FontBBox for Type 1 and TrueType fonts is misparsed.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00557 46th percentileScored 2026-11-07
Fix Fixed tcpdf (tecnick): 6.8.0tecnickcom/tc-lib-pdf-font (Packagist): 2.6.4
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/tc-lib-pdf-font (Packagist) | before 2.6.4 | 2.6.4 | Patch available | GHSA-grhh-r4jj-8jh7 |
- tcpdf VendorTecnick Affected before 6.8.0 Fixed in 6.8.0 Patch available CNA
- tecnickcom/tc-lib-pdf-font (Packagist) Vendor— Affected before 2.6.4 Fixed in 2.6.4 Patch available GHSA-grhh-r4jj-8jh7
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:tcpdf_project:tcpdf:*:*:*:*:*:*:*:* | — | — | Tcpdf Project |
- cpe:2.3:a:tcpdf_project:tcpdf:*:*:*:*:*:*:*:* Versions — — ·Tcpdf Project
Remediation
- Fix · CNA tcpdf (tecnick) Fixed in 6.8.0
- Fix · GHSA-grhh-r4jj-8jh7 tecnickcom/tc-lib-pdf-font (Packagist) Fixed in 2.6.4 Advisory →
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
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-2024-37409 Type confusion in Tecnick tcpdfPriority MEDIUM 40
Timeline
- 2026-10-02 Threatist record created from CVE-2024-56520
- 2026-10-03 Alias added: GHSA-grhh-r4jj-8jh7
References
Other 7
- https://tcpdf.org
- https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
- https://github.com/tecnickcom/TCPDF/commit/a0a02efe487cc39bd5223359e916dbeafb5cd6fe
- https://github.com/tecnickcom/tc-lib-pdf-font/commit/30012e333ae611c514ec2dc7cb370bbf4da4e677
- https://github.com/tecnickcom/tc-lib-pdf-font/compare/2.6.2...2.6.4
- https://github.com/tecnickcom/tc-lib-pdf-font
- https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html
More Tecnick vulnerabilities
- 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
Sources
- CVE-2024-56520 · CVE Program
- CVE-2024-56520 · NVD
- FIRST EPSS
- GHSA-grhh-r4jj-8jh7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences