CVE-2026-1046

⚠️ high

Summary

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

EPSS Score

0.0

Exploit Probability

Published Date

2026-02-16

First Seen: 2026-02-17

📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 69.3% of all 328,009 vulnerabilities in our database.

#100,584

Above average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Feb 17, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

hackerman70000

SSVC data provided by CISA

Last Modified 2026-03-23

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-939

📦 Affected Products 2

Vendor	Product	Status	Affected Versions
mattermost	mattermost_desktop	Affected	> 5.13.2 < 5.13.3
mattermost	mattermost_desktop	Affected	> 6.0.0 < 6.0.3

🔗 References 1

https://mattermost.com/security-updates

Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-6517	🔶 medium	6.3	0.2	Mattermost Desktop App versions <=6.1 5.5.13.0 fail to restrict the allow list of domains to which NTLM credentials were...	2026-06-15
CVE-2026-8683	🔶 medium	6.5	0.2	Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Matterm...	2026-06-15
CVE-2026-3471	🔶 medium	6.5	0.0	Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent an invalid URL from loading in a pop-up window in t...	2026-05-18
CVE-2026-4643	ℹ️ low	3.5	0.0	Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying ...	2026-05-18
CVE-2026-1628	🔶 medium	4.6	0.0	Mattermost Desktop App versions <=5.13.3 fail to attach listeners restricting navigation to external sites within the Ma...	2026-03-02
CVE-2025-13321	ℹ️ low	3.3	0.0	Mattermost Desktop App versions <6.0.0 fail to sanitize sensitive information from Mattermost logs and clear data on ser...	2025-12-17

These CVEs affect the same products