[ CVE-2026-116723 · Published 26 Oct 2026 ]
Vulnerability in fltk
CVSS 7.8
EPSS <1%No fix listed yet
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- github.com/fltk/fltk
- github.com/fltk/fltk/blob/release-1.4.5/src/Fl_BMP_Image.cxx
- github.com/fltk/fltk/commit/3a049d8262dc759cf9737339420e8457e24c0cb1
- github.com/fltk/fltk/issues/1632
- hackmd.io/@haindpwn/fltk-bmp-image-stack-heap-overflow
- www.vulncheck.com/advisories/fltk-through-1.4.5-stack-buffer-overflow-via-fl-bmp-image-…