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Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement

🗓️ 17 Apr 2026 15:31:17Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 3 Views

Mattermost session spoofing due to guest magic link tokens not single use; some versions affected; MMSA-2026-00624

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28 Apr 2026 22:57Current
5.2Medium risk
Vulners AI Score5.2
CVSS 3.16.5
EPSS0.00145
SSVC
3