CVE-2026-4858

Mattermost CVE-2026-4858 affects versions 11.6.x, 11.5.x, 11.4.x and 10.11.x where the integration action URL does not properly validate path traversal. This allows a malicious authenticated user to call an arbitrary API using the system admin Mattermost token by exploiting the path traversal in ...

CVE-2026-4858 Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action...

EUVD-2026-31242

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action...

CVE-2026-4858

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action...

CVE-2026-4858 Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action...

CVE-2026-4858 Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action...

CVE-2026-4055

Mattermost CVE-2026-4055 affects Mattermost versions 11.5.x

EUVD-2026-31221

Mattermost versions 11.5.x = 11.5.1 fail to validate team-level runcreate permission against the target team when creating a playbook run which allows an authenticated team member to create runs in teams where they lack permission via specifying a different team ID in the run creation API request...

CVE-2026-4055

Mattermost versions 11.5.x = 11.5.1 fail to validate team-level runcreate permission against the target team when creating a playbook run which allows an authenticated team member to create runs in teams where they lack permission via specifying a different team ID in the run creation API request...

CVE-2026-4055 Insufficient permission validation on cross-team playbook run creation

Mattermost versions 11.5.x = 11.5.1 fail to validate team-level runcreate permission against the target team when creating a playbook run which allows an authenticated team member to create runs in teams where they lack permission via specifying a different team ID in the run creation API request...

CVE-2026-4055 Insufficient permission validation on cross-team playbook run creation

Mattermost versions 11.5.x = 11.5.1 fail to validate team-level runcreate permission against the target team when creating a playbook run which allows an authenticated team member to create runs in teams where they lack permission via specifying a different team ID in the run creation API request...

PT-2026-42432

Name of the Vulnerable Software and Affected Versions Mattermost Mobile Apps versions prior to 2.38 Description The application fails to properly validate the SSO authentication callback origin. This allows an attacker who controls a malicious Mattermost server to steal user credentials for a...

Mattermost 安全漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Versions of Mattermost such as 11.5.1 and earlier 11.5.x have security vulnerabilities. These vulnerabilities stem from a failure to verify the team-level operating permissions for target teams,...

Mattermost Mobile Apps 跨站请求伪造漏洞

Mattermost Mobile Apps is a messaging mobile application developed by the American company Mattermost. Versions of Mattermost Mobile Apps prior to 2.0.37, 11.0.4 and earlier, 11.1.3 and earlier, 11.3.2 and earlier, as well as 10.11.11.0 and earlier, contain a cross-site request forgeing...

Mattermost 路径遍历漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Versions of Mattermost such as 11.6.0 and earlier 11.6.x series, 11.5.3 and earlier 11.5.x series, 11.4.4 and earlier 11.4.x series, as well as 10.11.14 and earlier 10.11.x series, have a path...

PT-2026-42404

Name of the Vulnerable Software and Affected Versions Mattermost version 11.5.1 Description An issue exists where the system fails to validate the team-level run create permission against the target team during the creation of a playbook run. This allows an authenticated team member to create run...

PT-2026-42439

Name of the Vulnerable Software and Affected Versions Mattermost version 11.6.0 Mattermost version 11.5.3 Mattermost version 11.4.4 Mattermost version 10.11.14 Description An authenticated user can perform path traversal in the integration action URL. This occurs because the software fails to...

PT-2026-42674

Name of the Vulnerable Software and Affected Versions NocoDB versions prior to 2026.04.1 Description The request-filtering-agent Server-Side Request Forgery SSRF protection is non-functional in the Slack, Discord, Mattermost, and Teams notification webhook plugins. This occurs because the httpAge...

Incorrect Authorization

Overview github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative Affected versions of this package are vulnerable to Incorrect Authorization via the command update API. An attacker can impersonate existing system or custom commands by editing their own slash...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the command update API. An attacker can impersonate existing system or custom commands by editing their own slash command trigger to match an already-registered trigger, potentially hijacking command...