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
INFO
Published Date :
2026-04-15T11:00:14.880Z
Last Modified :
2026-04-15T14:00:27.030Z
Source :
Mattermost
AFFECTED PRODUCTS
The following products are affected by CVE-2026-3590 vulnerability.
| Vendors | Products |
|---|---|
| Mattermost |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-3590.
| URL | Resource |
|---|---|
| https://mattermost.com/security-updates |
|
CVSS Vulnerability Scoring System
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact