PT-2026-42747 · Mattermost · Mattermost
Daw10
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Published
2026-05-22
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Updated
2026-05-22
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CVE-2026-4635
CVSS v3.1
6.5
Medium
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to archive the channel before removing persistent notifications which allows authenticated user to crash the server via timing the creation of persistent notification message between the server deleting existing persistent notifications and archiving the channel.. Mattermost Advisory ID: MMSA-2026-00637
Fix
Race Condition
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Weakness Enumeration
Related Identifiers
Affected Products
Mattermost