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Vulnerabilities CVE-2026-25646

CVE-2026-25646

High
Open
TLP:CLEAR

LIBPNG has a heap buffer overflow in png_set_quantize

NVD CVE.org
Critical Infrastructure

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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.

Details

CVSS Score
8.3
EPSS Score
0.96%

58.2th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Feb 10, 2026
Last Modified
Aug 11, 2026
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