CVE-2025-14435: Application-Level DoS via infinite re-render loop in user profile handling

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-16 · updated 2026-06-17
Weakness: CWE-770

Description

Mattermost versions 10.11.x <= 10.11.8, 11.1.x <= 11.1.1, 11.0.x <= 11.0.6 fail to prevent infinite re-renders on API errors which allows authenticated users to cause application-level DoS via triggering unbounded component re-render loops.

Affected products

Mattermost: from 10.11.0 before 10.11.9; from 11.0.0 before 11.0.7; from 11.1.0 before 11.1.2 — fixed in 10.11.9, 11.0.7, 11.1.2

How to fix

Upgrade to a fixed version: Mattermost 10.11.9, 11.0.7, 11.1.2. Check the vendor advisory for mitigations.

References

https://mattermost.com/security-updates

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