CVE-2026-6347

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields in the Mattermost Calls plugin which allows an attacker with access to a support packet to obtain TURN server credentials via the plaintext values present in the exported plugin configuration.. Mattermost Advisory ID: MMSA-2026-00605

Score
CVSS 3.1 7.6 High
Status
Analyzed - responsibledisclosure@mattermost.com
Published
2026-05-18
Last modified
2026-10-14
Weaknesses
CWE-200

Affected products

References

 
 
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