CVE-2026-1046

Published: Feb 16, 2026

Modified: Feb 17, 2026

PUBLISHED

CVSS v3.1

7.6

HIGH

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

Vendor	Product	Versions
Mattermost	Mattermost	affected `0 - <= 6.2.0` affected `0 - <= 5.2.13` unaffected `6.1.0` unaffected `6.0.3.0` unaffected `5.13.3.0`

Weaknesses (CWE)

CWE-939

CVSS v3.1 Details

CVSS v3.1 Vector

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

References

MMSA-2026-00577

vendor-advisory

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CVE-2026-1046

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References