CVE-2026-21386 Detail
Received
This CVE record has recently been published to the CVE List and has been included within the NVD dataset. DescriptionMattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to use consistent error responses when handling the /mute command which allows an authenticated team member to enumerate private channels they are not authorized to know about via differing error messages for nonexistent versus private channels. Mattermost Advisory ID: MMSA-2026-00588 Metrics
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CVSS 4.0 Severity and Vector Strings:
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Weakness Enumeration
Quick InfoCVE Dictionary Entry:CVE-2026-21386 NVD Published Date: 03/16/2026 NVD Last Modified: 03/16/2026 Source: Mattermost, Inc. |
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