EUVD-2026-40297

Rancher has over-inclusive team membership expansion in GitHub App authentication provider...

GHSA-4J6X-2764-M8GH Rancher has over-inclusive team membership expansion in GitHub App authentication provider

Impact A vulnerability has been identified within Rancher Manager in the GitHub App authentication provider. When evaluating permissions, the provider incorrectly expands user team memberships to include all teams within the associated GitHub organization, rather than restricting access to the...

CVE-2026-41053

Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2...

CVE-2026-41053 Over-inclusive team membership expansion in GitHub App authentication provider for Rancher

Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2...

CVE-2026-41053

CVE-2026-41053 affects Rancher’s GitHub authentication provider, specifically the team membership expansion, where an incorrect authentication caching flaw could grant principal access to any logged-in user. Affected versions are 2.13 prior to 2.13.6 and 2.14 prior to 2.14.2. Root cause: faulty c...

GHSA-JV9X-W4GM-HWCM Kimai has Missing Object-Level Authorization in the Team API

Summary The Team API endpoints use IsGranted'editteam' instead of IsGranted'edit', 'team', causing Symfony TeamVoter to abstain from voting. This removes entity-level ownership checks on team operations, allowing any user with the editteam permission to modify any team, not just teams they are...

EUVD-2026-12409

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID:...

CVE-2026-2458

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID:...

CVE-2026-2458

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID:...

CVE-2026-2458

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID:...

PT-2026-25684

Mattermost allows a removed team member to enumerate all public channels within a private team in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causi...

GO-2026-4521 Mattermost fails to properly validate team membership when processing channel mentions in github.com/mattermost/mattermost-server

Mattermost fails to properly validate team membership when processing channel mentions in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing...

Mattermost fails to properly validate team membership when processing channel mentions

Mattermost versions 11.1.x = 11.1.2, 10.11.x = 10.11.9, 11.2.x = 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the...

GHSA-57CC-2PF4-MHMX Mattermost fails to properly validate team membership when processing channel mentions

Mattermost versions 11.1.x = 11.1.2, 10.11.x = 10.11.9, 11.2.x = 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the...

CVE-2025-14350

Mattermost versions 11.1.x = 11.1.2, 10.11.x = 10.11.9, 11.2.x = 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the...

CVE-2025-14350

Mattermost versions 11.1.x = 11.1.2, 10.11.x = 10.11.9, 11.2.x = 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the...

CVE-2025-14350 Information disclosure via channel mentions in posts

Mattermost versions 11.1.x = 11.1.2, 10.11.x = 10.11.9, 11.2.x = 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the...

CVE-2025-14350

Mattermost advisory MMSA-2025-00563 covers CVE-2025-14350, affecting Mattermost versions 11.1.x (<=11.1.2), 10.11.x (<=10.11.9), and 11.2.x (

CVE-2025-14350

Mattermost versions 11.1.x = 11.1.2, 10.11.x = 10.11.9, 11.2.x = 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the...

PT-2026-8340

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.x through 10.11.9 Mattermost versions 11.1.x through 11.1.2 Mattermost versions 11.2.x through 11.2.1 Description The software does not properly validate team membership when processing channel mentions. This allows...