CVE-2026-42146 | THREATINT

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.

PUBLISHED Reserved 2026-04-24 | Published 2026-05-04 | Updated 2026-05-06 | Assigner GitHub_M

MEDIUM: 5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem types

CWE-789: Memory Allocation with Excessive Size Value

Product status

< c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3

affected

References

github.com/GreycLab/CImg/issues/477 exploit

github.com/...b/CImg/security/advisories/GHSA-g54r-qmgx-c6fv

github.com/GreycLab/CImg/issues/477

github.com/...ommit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3

github.com/GreycLab/CImg/releases/tag/v.3.7.5

cve.org (CVE-2026-42146)

nvd.nist.gov (CVE-2026-42146)

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