GitHub Advisoryadvisory · Go

GHSA-82j6-4fq7-fx62 Mattermost doesn't sanitize sensitive configuration fields in the Mattermost Calls plugin

HIGH Published 2026-05-18 Modified 2026-06-01 Official page ↗
Aliases
CVE-2026-6347
Ecosystem
Go
Packages
github.com/mattermost/mattermost-server, github.com/mattermost/mattermost-plugin-calls
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L
Weaknesses
CWE-200
Reviewed
2026-06-01

Affected packages

• Go github.com/mattermost/mattermost-server: >= 11.5.0, < 11.5.2 → fixed in 11.5.2 • Go github.com/mattermost/mattermost-server: >= 10.11.0, < 10.11.14 → fixed in 10.11.14 • Go github.com/mattermost/mattermost-server: >= 11.4.0, < 11.4.4 → fixed in 11.4.4 • Go github.com/mattermost/mattermost-plugin-calls: < 1.12.0-rc2 → fixed in 1.12.0-rc2

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

Related

Alias · CVE (1)

  • 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… vulnerability

Weakness · CWE (1)

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness

References