GitHub Advisoryadvisory · Go

GHSA-9p64-jpc7-m2rp Mattermost doesn't sanitize sensitive configuration fields before including them in support packet generation

HIGH Published 2026-05-18 Modified 2026-06-01 Official page ↗
Aliases
CVE-2026-6346
Ecosystem
Go
Packages
github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Weaknesses
CWE-200
Reviewed
2026-06-01

Affected packages

• Go github.com/mattermost/mattermost/server/v8: >= 11.5.0, < 11.5.2 → fixed in 11.5.2 • Go github.com/mattermost/mattermost/server/v8: >= 10.11.0, < 10.11.14 → fixed in 10.11.14 • Go github.com/mattermost/mattermost/server/v8: >= 11.4.0, < 11.4.4 → fixed in 11.4.4 • Go github.com/mattermost/mattermost/server/v8: < 8.0.0-20260326202606-fac92f4a71f3 → fixed in 8.0.0-20260326202606-fac92f4a71f3 • Go github.com/mattermost/mattermost-server: < 5.3.2-0.20260326202606-fac92f4a71f3 → fixed in 5.3.2-0.20260326202606-fac92f4a71f3

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 before including them in support packet generation, which allows a Mattermost System Admin or any party with access to a support packet to obtain sensitive credentials in plaintext via downloading a support packet from the System Console.. Mattermost Advisory ID: MMSA-2026-00607

Related

Alias · CVE (1)

  • CVE-2026-6346 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 before… vulnerability

Weakness · CWE (1)

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

References