CVE-2026-25646HIGH 8.1EPSS p55.1%

CVE-2026-25646CVE-2026-25646

Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.91% probability of exploitation · percentile 55.1% · 2026-06-18T12:00:27Z
Published2026-02-10
Last modified2026-02-13

Underlying weaknesses· 2

CWE-122CWE-126

References

  1. https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88
  2. https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3
  3. http://www.openwall.com/lists/oss-security/2026/02/09/7
  4. https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3

2

TypeTargetConfidenceTier
WeaknessHeap-based Buffer Overflowcwe-1220%live
WeaknessBuffer Over-readcwe-1260%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.