CVE-2026-42146
CImg Library: Uncontrolled memory allocation via nb_colors field in _load_bmp
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-789 |
| Vendor | greyclab |
| Product | cimg |
| Published | May 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
GreycLab / CImg
< c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3