CVE-2026-3713

pnggroup libpng pnm2png pnm2png.c do_pnm2png heap-based overflow

State: Published
Severity: 4.8 Medium
Published: Mar 8, 2026
Updated: Mar 11, 2026
Reserved: Mar 7, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	5.3 Medium	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	VulDB
3.0	5.3 Medium	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C	VulDB
2.0	4.3 Medium	AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:C	VulDB

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
libpngpnggroup	1.6.0Affected 1.6.1Affected 1.6.2Affected 1.6.3Affected 1.6.4Affected 1.6.5Affected 1.6.6Affected 1.6.7Affected 1.6.8Affected 1.6.9Affected 1.6.10Affected 1.6.11Affected 1.6.12Affected 1.6.13Affected 1.6.14Affected 1.6.15Affected 1.6.16Affected 1.6.17Affected 1.6.18Affected 1.6.19Affected 1.6.20Affected 1.6.21Affected 1.6.22Affected 1.6.23Affected 1.6.24Affected and 31 more versions

References

VDB-349658 | pnggroup libpng pnm2png pnm2png.c do_pnm2png heap-based overflowvdb-entrytechnical-description
VDB-349658 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #761996 | libpng pnm2png 1.8.0 Integer Overflow to Buffer Overflowthird-party-advisory
https://github.com/pnggroup/libpng/issues/794issue-tracking
https://github.com/biniamf/pocs/tree/main/pnm2pngexploit
https://github.com/pnggroup/libpng/product

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