CVE-2026-24458

Published: Mar 16, 2026

Modified: Mar 16, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

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

Vendor	Product	Versions
Mattermost	Mattermost	affected `11.3.0 - <= 11.3.0` affected `11.2.0 - <= 11.2.2` affected `10.11.0 - <= 10.11.10` unaffected `11.4.0` unaffected `11.3.1` +2 more versions

Weaknesses (CWE)

CWE-770

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

MMSA-2026-00587

vendor-advisory

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CVE-2026-24458

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References