CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 6.5. Exploitation may require the attacker to be authenticated. It may lead to a denial-of-service condition.
CVE
CVE-2026-5755
Severity
MEDIUM
CVSS
6.5
EPSS
0.24%
Original NVD Description
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.2, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate the TIFF IFD offset in the image header before allocating memory, which allows authenticated users with file upload or posting permissions to cause a denial of service (server OOM) via uploading a crafted TIFF file or posting a URL that serves one.. Mattermost Advisory ID: MMSA-2026-00648
Related CVEs
Other vulnerabilities affecting the same vendor(s)