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GHSA-MH4X-RMRX-3HP4 Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement

🗓️ 17 Apr 2026 15:31:17Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 5 Views

Mattermost fails to enforce single-use guest magic link tokens, enabling multiple sessions via requests.

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05 May 2026 16:09Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.16.5
EPSS0.00145
5