CVE-2026-6347
HIGH7.6EPSS 0.05%Mattermost doesn't sanitize sensitive configuration fields in the Mattermost Calls plugin
Published: 5/18/2026Modified: 6/1/2026
Description
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
Affected packages (2)
- Go/github.com/mattermost/mattermost-plugin-callsfrom 0, < 1.12.0-rc2
- Go/github.com/mattermost/mattermost-server>= 11.5.0, < 11.5.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.6 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L |