Low severity3.5NVD Advisory· Published Aug 17, 2026· Updated Aug 19, 2026
CVE-2026-9693
CVE-2026-9693
Description
Mattermost versions 10.11.x <= 10.11.20, 11.7.x <= 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via the team threads API.. Mattermost Advisory ID: MMSA-2026-00682
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <= 10.11.20, <= 11.7.5
Patches
Vulnerability mechanics
References
1- mattermost.com/security-updatesnvdVendor Advisory
News mentions
1- Mattermost: Twelve Vulnerabilities Disclosed, Including High-Severity Permission FlawsVypr Intelligence · Aug 17, 2026