CVE-2026-42146

Description

CImg Library is a C++ library for image processing. Prior to commit c3aacf5, the nb_colors field read from the BMP file header is used directly to compute an allocation size without validating it against the remaining file size. A crafted BMP file with a large nb_colors value triggers an out-of-memory condition, crashing any application that uses CImg to load untrusted BMP files. This issue has been patched via commit c3aacf5.

CVSS Vector

References

• https://github.com/GreycLab/CImg/commit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3
• https://github.com/GreycLab/CImg/issues/477
• https://github.com/GreycLab/CImg/releases/tag/v.3.7.5
• https://github.com/GreycLab/CImg/security/advisories/GHSA-g54r-qmgx-c6fv