CVE-2026-116723 FLTK - Buffer Overflow

FLTK through 1.4.5 contains a stack-based buffer overflow caused by an oversized BMP colors_used field in Fl_BMP_Image::load_bmp_(), letting attackers cause crashes or execute code by crafting malicious BMP or ICO files, exploit requires processing crafted image files.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
26 October 2026
Updated
27 October 2026
Weakness
CWE-121

Vendor fix

Update to a version later than 1.4.5 or apply available patches.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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