https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-09-30T16:44:10.244985+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/cve-2026-82920 CVE-2026-82920 — Mattermost ABAC parent policy bypass via policy update endpoint 2026-09-30T16:44:10.247140+00:00

Affected: Mattermost

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7 fail to enforce authorization boundaries on the access control policy update endpoint which allows a channel or team administrator to detach a system-assigned ABAC parent policy via a crafted PUT /api/v4/access_control_policies request with an empty imports list.. Mattermost Advisory ID: MMSA-2026-00724