Medium severity4.3NVD Advisory· Published May 18, 2026· Updated May 29, 2026
CVE-2026-6342
CVE-2026-6342
Description
Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid namespaces which allows plugin users to create subscriptions to groups that were not whitelisted via creating groups that share the same prefix as a whitelisted group. Mattermost Advisory ID: MMSA-2026-00601
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*Range: >=10.13.0,<=10.13.11
Patches
Vulnerability mechanics
References
1- mattermost.com/security-updatesnvdVendor Advisory
News mentions
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