Mattermost doesn't sanitize sensitive configuration fields in the Mattermost Calls plugin

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 plugi...

GHSA-82J6-4FQ7-FX62 Mattermost doesn't sanitize sensitive configuration fields in the Mattermost Calls plugin

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 plugi...

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 plugi...

EUVD-2026-30752

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 plugi...

CVE-2026-6347 Mattermost Calls plugin exposes TURN server credentials in plaintext in support packets

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 plugi...

CVE-2026-6347

Summary: CVE-2026-6347 affects Mattermost releases 11.5.x up to 11.5.1, 11.4.x up to 11.4.3, and 10.11.x up to 10.11.13. The vulnerability arises in the Mattermost Calls plugin where sensitive configuration fields are not sanitized. This allows an attacker with access to a support packet to obtai...

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 plugi...

CVE-2026-6347 Mattermost Calls plugin exposes TURN server credentials in plaintext in support packets

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 plugi...

PT-2026-41661

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 plugi...

Mattermost 信息泄露漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Versions of Mattermost such as 11.5.1 and earlier 11.5.x series, 10.11.13 and earlier 10.11.x series, and 11.4.3 and earlier 11.4.x series have a vulnerability related to information leakage. This...

Improper Validation of Specified Type of Input

Overview Affected versions of this package are vulnerable to Improper Validation of Specified Type of Input in the calls plugin when handling websocket messages containing malformed msgpack frames. An attacker can cause the server to consume excessive memory and crash by sending specially crafted...

CVE-2026-2454 DoS in Calls plugin via malformed msgpack in websocket request.

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to handle incorrectly reported array lengths which allows malicious user to cause OOM errors and crash the server via sending corrupted msgpack frames within websocket messages to calls plugin. Mattermost Advisory ID:...

CVE-2026-2454 DoS in Calls plugin via malformed msgpack in websocket request.

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to handle incorrectly reported array lengths which allows malicious user to cause OOM errors and crash the server via sending corrupted msgpack frames within websocket messages to calls plugin. Mattermost Advisory ID:...

CVE-2026-2454

Mattermost exposes a DoS vulnerability in the Calls plugin via malformed msgpack frames over WebSocket. Affected versions: 11.3.x ≤ 11.3.0, 11.2.x ≤ 11.2.2, 10.11.x ≤ 10.11.10. Root cause: incorrect handling of reported array lengths, enabling a malicious user to trigger OOM and crash the server....

PT-2026-25809

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to handle incorrectly reported array lengths which allows malicious user to cause OOM errors and crash the server via sending corrupted msgpack frames within websocket messages to calls plugin. Mattermost Advisory ID:...

GO-2025-4255 Mattermost fails to check Websocket request for proper UTF-8 format potentially crashing Calls plug-in in github.com/mattermost/mattermost-plugin-calls

Mattermost fails to check Websocket request for proper UTF-8 format potentially crashing Calls plug-in in github.com/mattermost/mattermost-plugin-calls...

CVE-2025-12689

Mattermost versions 11.0.x = 11.0.4, 10.12.x = 10.12.2, 10.11.x = 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request...

EUVD-2025-203918

Mattermost versions 11.0.x = 11.0.4, 10.12.x = 10.12.2, 10.11.x = 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request...

Mattermost fails to check Websocket request for proper UTF-8 format potentially crashing Calls plug-in

Mattermost versions 11.0.x = 11.0.4, 10.12.x = 10.12.2, 10.11.x = 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request...

CVE-2025-12689

Mattermost versions 11.0.x = 11.0.4, 10.12.x = 10.12.2, 10.11.x = 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request...