Buffer overflow in Pnggroup Libpng
CVE-2026-3713
A flaw has been found in pnggroup libpng up to 1.6.55. Affected by this vulnerability is the function do_pnm2png of the file contrib/pngminus/pnm2png.c of the component pnm2png. This manipulation of the argument width/height causes heap-ba…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (5.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Pnggroup Libpng — versions 1.6.0, 1.6.1, 1.6.2
Weakness classification (CWE)
References
- VDB-349658 | pnggroup libpng pnm2png pnm2png.c do_pnm2png heap-based overflow (technical-description, vdb-entry)
- VDB-349658 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #761996 | libpng pnm2png 1.8.0 Integer Overflow to Buffer Overflow (third-party-advisory)
- cna@vuldb.com (issue-tracking)
- cna@vuldb.com (exploit)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-3713?
- CVE-2026-3713 is a medium-severity vulnerability in Pnggroup Libpng, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-03-08.
- How severe is CVE-2026-3713?
- Medium severity. CVSS v3 base score is 5.3 out of 10.