CVE-2026-3590
Published: Apr 15, 2026
Modified: Apr 15, 2026
CVSS v3.1
6.5
Description
Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent requests.. Mattermost Advisory ID: MMSA-2026-00624
| Vendor | Product | Versions |
|---|---|---|
Mattermost | Mattermost | affected 10.11.0 - <= 10.11.12affected 11.5.0 - <= 11.5.0affected 11.4.0 - <= 11.4.2affected 11.3.0 - <= 11.3.2unaffected 11.6.0+4 more versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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