CVE-2026-1046

Name: CVE-2026-1046
Creator: NVD / NIST
Published: 2026-02-16T13:16:00.793+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2026-1046 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.24%

14.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-939

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Desktop	>= 5.13.2, < 5.13.3
Mattermost	Mattermost Desktop	>= 6.0.0, < 6.0.3

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Feb 16, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-1046?

How severe is CVE-2026-1046?

CVE-2026-1046 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1046?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-1046?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST