CVE-2026-6062

CVE-2026-6062CVE-2026-6062

mattermost / mattermost_server

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

Scoring

CVSS 6.4 ()
VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
Last modified2026-06-23
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.