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Vulnerability · Published Mar 8, 2026 · Assigned by VulDB

CVE-2026-3713pnggroup libpng pnm2png pnm2png.c do_pnm2png heap-based overflow

Medium 5.3

In plain English

A medium-severity heap buffer overflow in libpng from pnggroup. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.1%top 96.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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-based buffer overflow. The attack is restricted to local execution. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libpng1.6no fix listedDEBIAN-CVE-2026-3713
Debian:13libpng1.6no fix listedDEBIAN-CVE-2026-3713
Debian:14libpng1.6no fix listedDEBIAN-CVE-2026-3713

Affected products (as reported)

VendorProductVersions
pnggroup libpng 1.6.01.6.11.6.21.6.31.6.41.6.51.6.61.6.7

Weakness: CWE-122, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

References