CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 4.3. It may be remotely exploitable. It may lead to a denial-of-service condition.
CVE
CVE-2026-26233
Severity
MEDIUM
CVSS
4.3
EPSS
0.30%
Original NVD Description
Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to rate limit login requests which allows unauthenticated remote attackers to cause denial of service (server crash and restart) via HTTP/2 single packet attack with 100+ parallel login requests.. Mattermost Advisory ID: MMSA-2025-00566
Related CVEs
Other vulnerabilities affecting the same vendor(s)