CVE-2026-42146
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
ProductCImg
PublishedMay 4, 2026
First seenMay 4, 2026
Weakness typeCWE-789CWE-789
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| GreycLab CImg | < c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3 | — |
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