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CVE-2025-14822
Good to know:
Date: January 16, 2026
Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens
Severity Score
Related Resources (6)
Severity Score
Weakness Type (CWE)
Top Fix
Upgrade Version
Upgrade to version github.com/mattermost/mattermost-server - v10.11.9;github.com/mattermost/mattermost-server - v11.2.0;https://github.com/mattermost/mattermost.git - v11.2.0-rc3;https://github.com/mattermost/mattermost.git - v10.11.9
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | HIGH |
| Privileges Required (PR): | LOW |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | LOW |