CVE-2026-22801CWE-125CWE-190

LIBPNG has an integer truncation causing heap buffer over-read in png_image_write_*

Medium · published January 12, 2026

CVSS v3.1
6.8
EPSS
0%
Percentile
2.6
In the wild
Unconfirmed
What it is

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.6.26 to 1.6.53, there is an integer truncation in the libpng simplified write API functions png_write_image_16bit and png_write_image_8bit causes heap buffer over-read when the caller provides a negative row stride (for bottom-up image layouts) or a stride exceeding 65535 bytes. The bug was introduced in libpng 1.6.26 (October 2016) by casts added to silence compiler warnings on 16-bit systems. This vulnerability is fixed in 1.6.54.

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00134 · 2.6th percentile
Weaknesses
CWE-125 · Out-of-bounds Read; CWE-190 · Integer Overflow or Wraparound
Published
2026-01-12T22:57Z
EPSS history
Timeline
  • 12 JAN 22:57Z
    LIBPNG has an integer truncation causing heap buffer over-read in png_image_write_*
    cvelistv5