CVE-2026-6342
Published: May 18, 2026
Modified: May 18, 2026
CVSS v3.1
4.3
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
| Vendor | Product | Versions |
|---|---|---|
Mattermost | Mattermost | affected 0 - <= 11.1.5affected 0 - <= 10.13.11affected 0 - <= 11.3.4unaffected 11.6.0unaffected 11.5.2+2 more versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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