LIBPNG has a heap buffer overflow in png_set_quantize_CVE-2026-25646

8.3 / 10

HIGH

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

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.

Basic Information

ID CVE-2026-25646

Source GitHub_M

Published Feb 10, 2026 at 17:04

Modified Feb 10, 2026 at 17:25

Affected Product

Vendor pnggroup

Product libpng

Version < 1.6.55

Affected Versions pnggroup libpng < 1.6.55

CWE Classification

CWE-122 CWE-126

References

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    "published": "2026-02-10T17:04:38.501Z",
    "modified": "2026-02-10T17:25:31.583Z",
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