CVE-2026-6347

published 2026-05-18

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…

high 7.6 CVSS 3.1

AV N AC L PR H UI N S C C H I N A L

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

10 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-plugin-calls	>= 0 < 1.12.0-rc2	1.12.0-rc2
github.com	mattermost_mattermost-server	>= 10.11.0 < 10.11.14	10.11.14
github.com	mattermost_mattermost-server	>= 11.4.0 < 11.4.4	11.4.4
github.com	mattermost_mattermost-server	>= 11.5.0 < 11.5.2	11.5.2
mattermost	mattermost	10.11.0 – 10.11.13	—
mattermost	mattermost	11.4.0 – 11.4.3	—
mattermost	mattermost	11.5.0 – 11.5.1	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.14	10.11.14
mattermost	mattermost_server	>= 11.4.0 < 11.4.4	11.4.4
mattermost	mattermost_server	>= 11.5.0 < 11.5.2	11.5.2

CWE-200