CVE-2026-6062

—

CVSS 3.1

6.4 medium

EPSS

<1%p15

Published

Jun 22, 2026 (Jun 22, 2026)

Modified

Sep 15, 2026

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

Vendors: mattermost
Products: mattermost server
Ecosystems: go
Weakness: CWE-639
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
GHSA: GHSA-mxq2-5jpg-7474 (medium)

NVD CVE.org GitHub PoCs EPSS (0.2%)

In the news0 stories

No ingested article mentions this CVE yet.