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HIGH · 7.6

CVE-2026-1046

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...

Vulnerability 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

CVSS Score

7.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:L
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
LOW

Affected Products

VendorProductVersions
MattermostMattermost Desktop>= 5.13.2, < 5.13.3

Related Weaknesses (CWE)

CWE-939

References

FAQ

What is CVE-2026-1046?

CVE-2026-1046 is a vulnerability with a CVSS score of 7.6 (HIGH). 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...

How severe is CVE-2026-1046?

CVE-2026-1046 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-1046?

Check the references section above for vendor advisories and patch information. Affected products include: Mattermost Mattermost Desktop.