CVE-2026-117555 PUBLISHED

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.

• HaiND from the Post and Telecommunication Institute of Technology finder

• GitHub Issue #495
• https://github.com/GreycLab/CImg
• https://github.com/GreycLab/CImg/commit/b9ed613d9984f9caa1617b97e1db7e429cf14fd5
• https://github.com/GreycLab/CImg/blob/v.4.0.6/CImg.h#L55659
• VulnCheck Advisory: GreycLab CImg through 4.0.6 Heap Out-of-Bounds Read via Integer Overflow in _load_bmp()

• Integer Overflow or Wraparound CWE