Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/fltk/fltk
- https://github.com/fltk/fltk/blob/release-1.4.5/src/Fl_BMP_Image.cxx#L255-L265
- 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-stack-buffer-overflow-vi
FAQ
What is CVE-2026-116723?
CVE-2026-116723 is a vulnerability with a CVSS score of 7.8 (HIGH). 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. Atta...
How severe is CVE-2026-116723?
CVE-2026-116723 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-116723?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.