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CVE PROGRAM SOURCE RECORD8.3 High

CVE-2026-25646

LIBPNG has a heap buffer overflow in png_set_quantize

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Status
Published
Published
Updated
Assigning organization
GitHub_M

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

pnggroup libpng

  • < 1.6.55affected

References