CVE-2026-117555
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. A crafted BMP file with a large header width wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.
Risk Assessment
An attacker can supply a malicious BMP file, potentially causing application crashes or disclosure of heap memory. This may impact confidentiality or stability of services processing images.
Recommendation
Upgrade CImg to a version newer than 4.0.6 containing the fix. Until then, avoid processing untrusted BMP files.
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Original NVD description (English source)
CImg through 4.0.6 contains a heap out-of-bounds read vulnerability in the _load_bmp() function of CImg.h caused by an integer overflow in the row byte count. Attackers can supply a crafted BMP file with a large header width that wraps dx_bytes, causing crashes or heap memory disclosure into the decoded image.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

