CVE-2026-24458 — DoS attack via login attempts with multi-megabyte passwords

CVE-2026-24458

DoS attack via login attempts with multi-megabyte passwords PUBLISHED

Description (CNA)

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly handle very long passwords, which allows an attacker to overload the server CPU and memory via executing login attempts with multi-megabyte passwords. Mattermost Advisory ID: MMSA-2026-00587

Affected (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 11.3.0 through 11.3.0; affected 11.2.0 through 11.2.2; affected 10.11.0 through 10.11.10; unaffected 11.4.0; unaffected 11.3.1; unaffected 11.2.3; unaffected 10.11.11

CWE

CWE-770

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.