CVE-2026-3637
Published: May 18, 2026
Modified: May 18, 2026
CVSS v3.1
4.3
Description
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check the create_post channel permission during post edit operations which allows an authenticated attacker with revoked posting privileges to modify their existing posts via direct API requests to the post update and patch endpoints.. Mattermost Advisory ID: MMSA-2026-00627
| Vendor | Product | Versions |
|---|---|---|
Mattermost | Mattermost | affected 11.5.0 - <= 11.5.1affected 10.11.0 - <= 10.11.13affected 11.4.0 - <= 11.4.3unaffected 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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