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TI-2026-03204 Aliases CVE-2026-3713GHSA-fgc7-hpwc-cmc9

pnggroup libpng pnm2png pnm2png.c do_pnm2png heap-based overflow

Priority MEDIUM 55CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00147 3rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pnggrouplibpng1.6.0; 1.6.1; 1.6.2; 1.6.3; 1.6.4; 1.6.5; 1.6.6; 1.6.7; 1.6.8; 1.6.9; 1.6.10; 1.6.11; 1.6.12; 1.6.13; 1.6.14; 1.6.15; 1.6.16; 1.6.17; 1.6.18; 1.6.19; 1.6.20; 1.6.21; 1.6.22; 1.6.23; 1.6.24; 1.6.25; 1.6.26; 1.6.27; 1.6.28; 1.6.29; 1.6.30; 1.6.31; 1.6.32; 1.6.33; 1.6.34; 1.6.35; 1.6.36; 1.6.37; 1.6.38; 1.6.39; 1.6.40; 1.6.41; 1.6.42; 1.6.43; 1.6.44; 1.6.45; 1.6.46; 1.6.47; 1.6.48; 1.6.49; 1.6.50; 1.6.51; 1.6.52; 1.6.53; 1.6.54; 1.6.55—No fix listedCNA
  • libpng Vendorpnggroup Affected 1.6.0; 1.6.1; 1.6.2; 1.6.3; 1.6.4; 1.6.5; 1.6.6; 1.6.7; 1.6.8; 1.6.9; 1.6.10; 1.6.11; 1.6.12; 1.6.13; 1.6.14; 1.6.15; 1.6.16; 1.6.17; 1.6.18; 1.6.19; 1.6.20; 1.6.21; 1.6.22; 1.6.23; 1.6.24; 1.6.25; 1.6.26; 1.6.27; 1.6.28; 1.6.29; 1.6.30; 1.6.31; 1.6.32; 1.6.33; 1.6.34; 1.6.35; 1.6.36; 1.6.37; 1.6.38; 1.6.39; 1.6.40; 1.6.41; 1.6.42; 1.6.43; 1.6.44; 1.6.45; 1.6.46; 1.6.47; 1.6.48; 1.6.49; 1.6.50; 1.6.51; 1.6.52; 1.6.53; 1.6.54; 1.6.55 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:*——pnggroup
  • cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:* Versions — — ·pnggroup

Remediation

Red Hat 1 advisory

  • RHSA-2026:6732 Released 2026-04-07 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images libpng-1.6.56-1.hum1@aarch64, libpng-1.6.56-1.hum1@src, libpng-1.6.56-1.hum1@x86_64 +6

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:6732
Not affected: 11 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4
  • Red Hat build of OpenJDK 1.8
  • Red Hat build of OpenJDK 11 ELS
  • Red Hat build of OpenJDK 17
  • Red Hat build of OpenJDK 21
  • Red Hat build of OpenJDK 25

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3713
  2. 2026-10-03 Alias added: GHSA-fgc7-hpwc-cmc9

References

Exploit 1

Other 2

  • TI-2011-02683 Integer signedness error in the png_inflate function in pngrutil.c in libpng before… CVSS 3.1HIGH 8.8
  • TI-2010-01161 Buffer overflow in pngpread.c in libpng before 1.2.44 and 1.4.x before 1.4.3, as used in… CVSS 3.1CRITICAL 9.8
  • TI-2026-20746 LIBPNG has a heap buffer overflow in png_set_quantize CVSS 4.0HIGH 8.3
  • TI-2025-40204 LIBPNG is vulnerable to a heap buffer overflow in `png_combine_row` triggered via `png_image_finish_read` CVSS 3.1HIGH 7.1
  • TI-2025-40767 LIBPNG has an out-of-bounds read in png_image_read_composite CVSS 3.1HIGH 7.1
  • TI-2025-40066 LIBPNG is vulnerable to a buffer overflow in `png_image_read_composite` via incorrect palette premultiplication CVSS 3.1HIGH 7.1
See all 60 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences