CVE-2025-14822

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

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

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-407 CWE-770

Affected software

Vendor	Product	Versions
Mattermost	Mattermost	>= 10.11.0, <= 10.11.8

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Jan 16, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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