NVD security advisory
Security advisory for FLTK
CVE-2026-116724
Full advisory details, affected packages, severity context, and original source.
Affected technology
FLTKAffected product
Advisory overview
FLTK through 1.4.5 contains an integer overflow vulnerability in Fl_BMP_Image::load_bmp_() that causes undersized pixel buffer allocation from file-supplied width and height. Attackers can supply a crafted BMP or ICO file with large dimensions so row decoding writes file-derived data past the heap buffer, corrupting the application heap.
Related references
- https://github.com/fltk/fltk
- https://github.com/fltk/fltk/blob/release-1.4.5/src/Fl_BMP_Image.cxx#L281-L286
- https://github.com/fltk/fltk/commit/3a049d8262dc759cf9737339420e8457e24c0cb1
- https://github.com/fltk/fltk/issues/1632
- https://hackmd.io/@haindpwn/fltk-bmp-image-stack-heap-overflow
- https://www.vulncheck.com/advisories/fltk-through-1.4.5-heap-buffer-overflow-via-fl-bmp-image-integer-overflow