CVEvulnerability

CVE-2026-6062

6.4 MEDIUM Published 2026-06-22 Modified 2026-06-23 Official page ↗
Status
Analyzed
Published
2026-06-22
Last modified
2026-06-23
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.4 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
Weaknesses
CWE-639

Description

Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 Fail to validate channel ownership of an existing subscription before applying edits which allows an authenticated attacker to hijack subscriptions from channels they have no access to via a crafted PUT request to the subscription edit endpoint.. Mattermost Advisory ID: MMSA-2026-00650

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.18) • mattermost mattermost server (>= 11.5.0 < 11.5.6) • mattermost mattermost server (>= 11.6.0 < 11.6.3) • mattermost mattermost server (>= 11.7.0 < 11.7.1)

Related

Weakness · CWE (1)

  • CWE-639 Authorization Bypass Through User-Controlled Key weakness

References