EUVD-2026-22915

| CVE-2026-3590 MEDIUM
2026-04-15 Mattermost
Information Disclosure
6.5
CVSS 3.1
Share

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
Apr 15, 2026 - 11:41 vuln.today

DescriptionNVD

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

AnalysisAI

Mattermost versions 10.11.x through 10.11.12, 11.3.x through 11.3.2, 11.4.x through 11.4.2, and 11.5.0 fail to enforce atomic consumption of guest magic link tokens, allowing unauthenticated attackers to establish multiple concurrent authenticated sessions from a single valid magic link. This enables unauthorized access and potential information disclosure without requiring additional credentials or user interaction beyond intercepting or obtaining the link.

Sign in for full analysis, threat intelligence, and remediation guidance.

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Sign in - Free

Share

EUVD-2026-22915 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy