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CVE-20XX-?

CVE-2026-1046

7.6 HIGH 0.3% exploit odds Fix listed Code execution Server

What it is

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

At a glance

Exploitability: Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data exposure.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-02-16 13:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-15 13:32 UTC Last updatedMost recent change to the record

Details

Published: 2026-02-16 13:16 UTC
Last modified: 2026-10-15 13:32 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-939
Record status: Analyzed

Affected

Mattermost Desktop < 5.13.3
Mattermost Desktop < 6.0.3

Attack profile CVSS 3.1 · 7.6

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required
Scope: Changed
Confidentiality: High
Integrity: None
Availability: Low

Raw vector

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

Meme: I wake up, CVE-2026-1046

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Fix and advisories

https://mattermost.com/security-updates

References

https://mattermost.com/security-updates

NVD record · CVE.org record