High severity7.8NVD Advisory· Published Oct 26, 2026
CVE-2026-116723
CVE-2026-116723
Description
FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.
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Affected products
1Patches
Vulnerability mechanics
References
5- github.com/fltk/fltk/blob/release-1.4.5/src/Fl_BMP_Image.cxxnvd
- github.com/fltk/fltk/commit/3a049d8262dc759cf9737339420e8457e24c0cb1nvd
- github.com/fltk/fltk/issues/1632nvd
- hackmd.io/@haindpwn/fltk-bmp-image-stack-heap-overflownvd
- www.vulncheck.com/advisories/fltk-through-1.4.5-stack-buffer-overflow-via-fl-bmp-image-colors-used-fieldnvd
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