Integer Overflow in FLTK Affects BMP Image Processing
CVE-2026-116724

8.5HIGH

Key Information:

Vendor

Fltk

Status
Fltk
Vendor
CVE Published:
26 October 2026

What is CVE-2026-116724?

An integer overflow vulnerability exists in the FLTK library, specifically within the Fl_BMP_Image::load_bmp_() function. When processing crafted BMP or ICO files, inadequate pixel buffer allocation occurs due to user-supplied width and height dimensions. This flaw allows attackers to manipulate the decoding process, potentially writing beyond the allocated heap buffer and corrupting the application's memory space. Such exploitation could lead to unpredictable application behavior or crash, emphasizing the need for immediate remediation.

Affected Version(s)

fltk 0 <= 1.4.5

References

https://github.com/fltk/fltk/issues/1632
issue-tracking
https://github.com/fltk/fltk
product
https://github.com/fltk/fltk/commit/3a049d8262dc759cf9737...
patch

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.