CVE-2025-14822

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CVSS 3.1

6.5 medium

EPSS

<1%p26

Published

Jan 16, 2026 (Jan 16, 2026)

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

Vendors: mattermost
Products: mattermost server
Weakness: CWE-407, CWE-770
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.3%)

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