Heap Out-of-Bounds Read Vulnerability in CImg by GreycLab
CVE-2026-117555

6.9MEDIUM

Key Information:

Vendor

Greyclab

Status
Cimg
Vendor
CVE Published:
27 October 2026

What is CVE-2026-117555?

CImg, a widely used library for image processing, is affected by a vulnerability that results in a heap out-of-bounds read in the _load_bmp() function located in CImg.h. This issue is triggered by an integer overflow when processing the row byte count of a crafted BMP file. Attackers can exploit this vulnerability by supplying a specially designed BMP file with an oversized header width, potentially leading to application crashes or exposing sensitive heap memory content in the decoded image.

Affected Version(s)

CImg 0 <= 4.0.6

References

https://github.com/GreycLab/CImg/issues/495
issue-tracking
https://github.com/GreycLab/CImg
product
https://github.com/GreycLab/CImg/commit/b9ed613d9984f9caa...
patch

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.