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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.

PUBLISHED Reserved 2026-03-07 | Published 2026-03-08 | Updated 2026-03-08 | Assigner VulDB




MEDIUM: 4.8CVSS: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
MEDIUM: 5.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C
MEDIUM: 5.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C
4.3AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:C

Problem types

Heap-based Buffer Overflow

Memory Corruption

Product status

1.6.0
affected

1.6.1
affected

1.6.2
affected

1.6.3
affected

1.6.4
affected

1.6.5
affected

1.6.6
affected

1.6.7
affected

1.6.8
affected

1.6.9
affected

1.6.10
affected

1.6.11
affected

1.6.12
affected

1.6.13
affected

1.6.14
affected

1.6.15
affected

1.6.16
affected

1.6.17
affected

1.6.18
affected

1.6.19
affected

1.6.20
affected

1.6.21
affected

1.6.22
affected

1.6.23
affected

1.6.24
affected

1.6.25
affected

1.6.26
affected

1.6.27
affected

1.6.28
affected

1.6.29
affected

1.6.30
affected

1.6.31
affected

1.6.32
affected

1.6.33
affected

1.6.34
affected

1.6.35
affected

1.6.36
affected

1.6.37
affected

1.6.38
affected

1.6.39
affected

1.6.40
affected

1.6.41
affected

1.6.42
affected

1.6.43
affected

1.6.44
affected

1.6.45
affected

1.6.46
affected

1.6.47
affected

1.6.48
affected

1.6.49
affected

1.6.50
affected

1.6.51
affected

1.6.52
affected

1.6.53
affected

1.6.54
affected

1.6.55
affected

Timeline

2026-03-07:Advisory disclosed
2026-03-07:VulDB entry created
2026-03-07:VulDB entry last update

Credits

biniam (VulDB User) reporter

References

vuldb.com/?id.349658 (VDB-349658 | pnggroup libpng pnm2png pnm2png.c do_pnm2png heap-based overflow) vdb-entry technical-description

vuldb.com/?ctiid.349658 (VDB-349658 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.761996 (Submit #761996 | libpng pnm2png 1.8.0 Integer Overflow to Buffer Overflow) third-party-advisory

github.com/pnggroup/libpng/issues/794 issue-tracking

github.com/biniamf/pocs/tree/main/pnm2png exploit

github.com/pnggroup/libpng/ product

cve.org (CVE-2026-3713)

nvd.nist.gov (CVE-2026-3713)

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