PT-2026-25699 · Mattermost · Github.Com/Mattermost/Mattermost-Server+1

Winfunc

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Published

2026-02-13

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Updated

2026-03-27

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CVE-2026-24458

CVSS v2.0

7.8

High

VectorAV:N/AC:L/Au:N/C:N/I:N/A:C
Name of the Vulnerable Software and Affected Versions Mattermost versions 11.3.0 and earlier Mattermost versions 11.2.2 and earlier Mattermost versions 10.11.10 and earlier
Description The software does not correctly manage very long passwords. This allows an attacker to exhaust server resources, specifically CPU and memory, by repeatedly attempting to log in with excessively large passwords. The issue is present in the github.com/mattermost/mattermost-server module prior to version v5.3.2-0.20260129164748-7201f42d955f.
Recommendations Update Mattermost to a version later than 11.3.0. Update Mattermost to a version later than 11.2.2. Update Mattermost to a version later than 10.11.10. Update the github.com/mattermost/mattermost-server module to version v5.3.2-0.20260129164748-7201f42d955f or later.

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

BDU:2026-06564
CVE-2026-24458
GHSA-M5RV-56XX-HFC6
GO-2026-4731
SUSE-SU-2026:1135-1

Affected Products

Mattermost
Github.Com/Mattermost/Mattermost-Server