SecuriTricks - CVE-2026-1046

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

Product(s) Impacted

Vendor	Product	Versions
Mattermost	Mattermost Desktop App	<=6.2.0, 5.2.13.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-939

Improper Authorization in Handler for Custom URL Scheme

The product uses a handler for a custom URL scheme, but it does not properly restrict which actors can invoke the handler using the scheme.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mattermost	mattermost_desktop_app	<=6.2.0	/	/	/	/	/	/	/
a	mattermost	mattermost_desktop_app	5.2.13.0	/	/	/	/	/	/	/

References

https://mattermost.com/security-updates

CVSS Score

7.6 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: LOW
Scope: CHANGED
Confidentiality Impact: HIGH
Integrity Impact: NONE
Availability Impact: LOW

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

View Vector String

Timeline

Published: Feb. 16, 2026, 1:16 p.m.
Last Modified: Feb. 16, 2026, 1:16 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-1046