Is CVE-2026-24458 actively exploited?

No active exploitation of CVE-2026-24458 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-24458 be exploited remotely?

Yes. CVE-2026-24458 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-24458?

CVE-2026-24458 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-24458

HIGH

CVE-2026-24458

CWE-770Published: March 16, 2026· Updated: Mar 18, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.8th

Official 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

NVD Source

Technical Analysis

CVE-2026-24458 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.