Medium severity · published Oct 27, 2026
CVE-2026-117555
GreycLab CImg through 4.0.6 Heap Out-of-Bounds Read via Integer Overflow in _load_bmp()
New
6.1
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CI
CImg · GreycLab
through 4.0.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-117555
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-117555
github.com
https://github.com/GreycLab/CImg
github.com
https://github.com/GreycLab/CImg/blob/v.4.0.6/CImg.h#L55659
github.com
https://github.com/GreycLab/CImg/commit/b9ed613d9984f9caa1617b97e1db7e429cf14fd5
github.com
https://github.com/GreycLab/CImg/issues/495
www.vulncheck.com
https://www.vulncheck.com/advisories/greyclab-cimg-through-4.0.6-heap-out-of-bounds-read-via-integer-overflow-in-load-bmp
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