CVE-2026-3713pnggroup libpng pnm2png pnm2png.c do_pnm2png heap-based overflow
- 4.8MediumCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
Timeline
ID reserved
By VulDB
- 1 day later
· 1 day later
Published
- 3 days later
· 3 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulDBCNA (assigner) | 4.0 | Medium4.8 | 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 |
| VulDBCNA (assigner) | 3.1 | Medium5.3 | 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 |
| VulDBCNA (assigner) | 3.0 | Medium5.3 | 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 |
| VulDBCNA (assigner) | 2.0 | Medium4.3 | AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:C |
| NVDNVD · Deferred | 4.0 | Low1.9 | 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.8.
Affected products
- affected 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
- and 16 more
References
References6
- VDB-349658 | pnggroup libpng pnm2png pnm2png.c do_pnm2png heap-based overflow (opens in a new tab)vdb-entrytechnical-description
- VDB-349658 | CTI Indicators (IOB, IOC, IOA) (opens in a new tab)signaturepermissions-required
- Submit #761996 | libpng pnm2png 1.8.0 Integer Overflow to Buffer Overflow (opens in a new tab)third-party-advisory
- https://github.com/pnggroup/libpng/issues/794 (opens in a new tab)issue-tracking
- https://github.com/biniamf/pocs/tree/main/pnm2png (opens in a new tab)exploit
- https://github.com/pnggroup/libpng/ (opens in a new tab)product
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-10219 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-3713)Record last updated .