CVE-2026-4274 Detail
Received
This CVE record has recently been published to the CVE List and has been included within the NVD dataset. DescriptionMattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared channel via sending crafted membership sync messages that trigger team membership assignment. Mattermost Advisory ID: MMSA-2026-00574 Metrics
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CVSS 4.0 Severity and Vector Strings:
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Weakness Enumeration
Quick InfoCVE Dictionary Entry:CVE-2026-4274 NVD Published Date: 03/26/2026 NVD Last Modified: 03/26/2026 Source: Mattermost, Inc. |
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