Out-of-bounds write in ImageSharp - #VU150203
Published: September 16, 2026
Vulnerability identifier: #VU150203
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds write in GrayscaleLevelsRowOperation when processing attacker-supplied 32-bit floating-point TIFF images through HistogramEqualization(). A remote attacker can supply a TIFF image containing non-finite or out-of-range luminance values to cause a denial of service.
The report covers HistogramEqualization() only and does not claim Adaptive Histogram Equalization or AutoLevel behavior.
Affected software
ImageSharp
Remediation
Install security update from vendor's website.
ImageSharp - update to 4.1.2