CVE-2026-116724

EUVD-2026-110505
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
7.8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 3.9%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
fltk_projectfltk
𝑥
≤ 1.4.5
CNA
Common Weakness Enumeration
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