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Mattermost doesn't validate CSRF tokens on an authentication endpoint

🗓️ 17 Apr 2026 15:31:17Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 2 Views

Mattermost CSRF validation fails on authentication endpoint, enabling CSRF to update a user's method.

Related
Detection
Refs
Vulners
Node
mattermostmattermostRange11.3.0-rc111.3.3go
OR
mattermostmattermostRange11.4.0-rc111.4.3go
OR
mattermostmattermostMatch11.5.0-rc1go
OR
mattermostmattermostRange8.0.0-20250721062209-4952acea88ce8.0.0-20260220133927-c29cf05d40f8go

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29 Apr 2026 20:35Current
5.2Medium risk
Vulners AI Score5.2
CVSS 3.16.8 - 8.1
EPSS0.00019
SSVC
2