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CVE-2026-3471

đŸ”ļ medium
🔍 Scan for this CVE
Summary

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 the Mattermost Desktop App which allows a malicious server owner to repeated crash the application via calling {{window.open('javascript:alert()');}}. Mattermost Advisory ID: MMSA-2026-00618

CVSS Score
6.5
Medium
EPSS Score
0.0
Exploit Probability
Published Date
2026-05-18
First Seen: 2026-05-19
📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 46.7% of all 356,676 vulnerabilities in our database.

#190,194
Below average severity
Severity Percentile
đŸŽ¯ CISA SSVC Assessment Updated: May 18, 2026
🔍 Exploitation Status
None
No known exploits
⚙ī¸ Automatable
NO
Requires human interaction
đŸ’Ĩ Technical Impact
Partial
Limited system impact
🏆 Discovered By
game0v3r
SSVC data provided by CISA
Last Modified 2026-06-05
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE IDs (Weakness Types)
CWE-939

đŸ“Ļ Affected Products 3

Vendor Product Status Affected Versions
mattermost mattermost_desktop Affected
< 5.4.13.0
mattermost mattermost_desktop Affected
> 6.0.0 < 6.0.1
mattermost mattermost_desktop Affected
> 6.1.0 < 6.2.0

🔗 References 1

https://mattermost.com/security-updates
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-75587 ℹī¸ low 3.6 0.1 Mattermost Desktop App versions <=6.2 6.2.2.0 fail to redact the pre-auth secret when generating a diagnostics report, w... 2026-08-17
CVE-2026-8075 đŸ”ļ medium 6.5 0.2 Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Matter... 2026-07-17
CVE-2026-9602 đŸ”ļ medium 6.5 0.2 Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the D... 2026-07-17
CVE-2026-6517 đŸ”ļ 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 đŸ”ļ 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-2026-4643 ℹī¸ 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
These CVEs affect the same products