CVE-2026-1629

MEDIUM
2026-03-16 Mattermost
4.3
CVSS 3.1
Share

CVSS Vector

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

Lifecycle Timeline

2
Analysis Generated
Mar 16, 2026 - 20:38 vuln.today
CVE Published
Mar 16, 2026 - 20:24 nvd
MEDIUM 4.3

Tags

Information Disclosure Mattermost

Description

Mattermost versions 10.11.x <= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580

Analysis

Mattermost 10.11.x through 10.11.10 fails to clear cached permalink preview data when a user's channel access is revoked, allowing authenticated users to view private channel content through previously cached previews until the cache expires or they re-login. An authenticated attacker who previously had access to a private channel can exploit this to maintain visibility into sensitive channel communications after access removal. …

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

Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Sign in for detailed remediation steps.

Full analysis requires sign-in

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

Sign in - Free

Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +22
POC: 0

Share

CVE-2026-1629 vulnerability details – vuln.today
Back

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