CVE records

Every CVE as the CVE Program publishes it, refreshed every ten minutes, with NVD's analysis, CISA's known-exploited status and a healthcare tag. Subscribers get the CVEs that match their own systems on My program, by email as they are published. Where the data comes from: sources.

Updated under an hour ago ()

What this means for you

This week: 5,437 CVEs published, 355 critical, and 7 newly confirmed exploited. Add your stack to see whether any of them hit you.

Published in the last 7 days
5,437
Show in the list
Critical, last 7 days
355
Show in the list
Healthcare-tagged, last 7 days
4
Show in the list
Known exploited (CISA KEV)
1,747
Show in the list

Showing CVEs that name the product mattermost:mattermost_server. Show all products

163 CVEs, showing 1 to 50Page 1 of 4Next
CVESeverityTitlePublished
CVE-2026-96260Medium 6.5Mattermost server missing request body size limit on plugin routes allows denial of service by an authenticated user
Assigned by Mattermost
Sep 22, 2026
CVE-2026-96259Medium 5.5Mattermost server-side request forgery via OAuth endpoints configurable by a System Administrator
Assigned by Mattermost
Sep 22, 2026
CVE-2026-95666Medium 4.3Unbounded post ID array in the bulk reactions endpoint allows denial of service
Assigned by Mattermost
Sep 22, 2026
CVE-2026-91181Medium 6.5Data Retention Teams Endpoint Leaks Private Team Invite ID
Assigned by Mattermost
Sep 14, 2026
CVE-2026-12985Medium 6.8Mattermost DCR redirect URI allowlist bypass via improper URL component validation
Assigned by Mattermost
Sep 14, 2026
CVE-2026-82920Medium 5.5Mattermost ABAC parent policy bypass via policy update endpoint
Assigned by Mattermost
Sep 14, 2026
CVE-2026-86348Medium 4.3MS Calendar plugin: unrecovered handler panics from malformed post-action requests could crash the plugin process
Assigned by Mattermost
Sep 14, 2026
CVE-2026-86349Medium 4.3Mattermost Server Algorithmic DoS via Unbounded Markdown Block Nesting
Assigned by Mattermost
Sep 14, 2026
CVE-2026-10556Medium 5.3Unauthenticated webhook request with null notification entry could crash the Microsoft Calendar plugin.
Assigned by Mattermost
Sep 14, 2026
CVE-2026-13417Medium 4.3Boards plugin denial of service via unvalidated block fields.properties
Assigned by Mattermost
Sep 14, 2026
CVE-2026-9812Medium 6.5Missing property field ownership validation in Playbooks run property update endpoint
Assigned by Mattermost
Sep 14, 2026
CVE-2026-8821High 7.1Playbooks run owner channel membership permission bypass
Assigned by Mattermost
Sep 14, 2026
CVE-2026-5132Medium 6.5Unbounded zlib decompression in Calls SDP WebSocket messages
Assigned by Mattermost
Sep 14, 2026
CVE-2026-15814Medium 6.5Uploading a crafted image causes excessive memory allocation in the Mattermost Server
Assigned by Mattermost
Sep 14, 2026
CVE-2026-10542Medium 5.0Playbooks channel action update validation issue
Assigned by Mattermost
Sep 14, 2026
CVE-2026-14344Medium 4.3Inconsistent authorization checks in Mattermost Boards endpoints
Assigned by Mattermost
Sep 14, 2026
CVE-2026-12882Medium 4.3Mattermost Markdown autolink parsing denial of service
Assigned by Mattermost
Sep 14, 2026
CVE-2026-11993Medium 4.3Fix authenticated members disabling file content indexing server-wide via extraction pool exhaustion
Assigned by Mattermost
Sep 14, 2026
CVE-2026-14259Medium 4.3Board archive import bypasses team board creation permissions
Assigned by Mattermost
Sep 14, 2026
CVE-2026-9693Low 3.5Mattermost thread memberships persist after team removal, exposing private channel thread metadata on re-invite
Assigned by Mattermost
Aug 17, 2026
CVE-2026-9859Medium 6.5Mattermost Boards plugin didn’t enforce role-based authorization on board channel link allowing board editors to expose boards to arbitrary channels
Assigned by Mattermost
Aug 17, 2026
CVE-2026-9816High 8.3Insufficient server-side validation of board member role fields permits privilege escalation
Assigned by Mattermost
Aug 17, 2026
CVE-2026-10080Medium 6.5Boards plugin panics on WebSocket command with non-string field types
Assigned by Mattermost
Aug 17, 2026
CVE-2026-10527Medium 6.3Boards plugin retains Board Admin rights for users demoted to System Guest
Assigned by Mattermost
Aug 17, 2026
CVE-2026-15754Medium 4.2Missing per-channel team-scope check in ABAC access control policy unassign allows cross-team policy removal
Assigned by Mattermost
Aug 17, 2026
CVE-2026-16044Low 3.9Insufficient validation of guest board admin privileges on archive import
Assigned by Mattermost
Aug 17, 2026
CVE-2026-16045Low 2.7Delegated OAuth tokens could revoke unrelated OAuth application authorizations
Assigned by Mattermost
Aug 17, 2026
CVE-2026-16047Medium 4.3Board channel linking without read channel permission validation
Assigned by Mattermost
Aug 17, 2026
CVE-2026-16046Low 3.5Missing run-state validation on finished playbook runs
Assigned by Mattermost
Aug 17, 2026
CVE-2026-16048Medium 6.3Channel member roles accept out-of-scope roles
Assigned by Mattermost
Aug 17, 2026
CVE-2026-14298Medium 6.5Boards archive import endpoint allows resource exhaustion via zip bomb and file size limit bypass in Mattermost
Assigned by Mattermost
Aug 13, 2026
CVE-2026-7521Medium 5.5Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to verify file deletion path which allows an admin with SAML system-console write permissions to del…Jul 28, 2026
CVE-2026-10819Medium 6.5Mattermost versions 11.6.x <= 11.6.5, 10.11.x <= 10.11.20, 11.8.x <= 11.8.1, 11.7.x <= 11.7.4 fail to limit the number of frames and enforce the file size cap on animated GIF uploads, which allows an…Jul 27, 2026
CVE-2026-10600Medium 4.3Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to bound the time and resource consumption of server-side document content extraction which allows a…Jul 27, 2026
CVE-2026-9824Medium 4.3Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to check the manage_shared_channels permission in the /share-channel autocomplete handler, which allows an authenticat…Jul 13, 2026
CVE-2026-9820Low 3.8Mattermost versions 11.7.x <= 11.7.2, 10.11.x <= 10.11.19 fail to sanitize team objects returned by the scheme teams endpoint, which allows a user with the User Manager role to obtain invite links fo…Jul 13, 2026
CVE-2026-6541Medium 4.3Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which allows an authenticated user with team acc…Jul 13, 2026
CVE-2026-9708Medium 4.9Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to validate that an assigned incoming webhook user has access to the target team or channel, which allows a requester…Jul 13, 2026
CVE-2026-9597Medium 5.4Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4 fail to verify whether a guest account is deactivated before creating a session in the magic-link token login path, which allows a deactivated g…Jul 13, 2026
CVE-2026-9571Medium 6.5Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to invalidate OAuth refresh tokens upon user account deactivation, which allows a deactivated user or an attacker in p…Jul 13, 2026
CVE-2026-6850Medium 6.5Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to validate the length and content of message attachment field values, which allows an authenticated attacker to cause…Jul 13, 2026
CVE-2026-10106Medium 6.5Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to verify that the channel referenced in an action cookie matches the channel of the target post, which allows an auth…Jul 13, 2026
CVE-2026-10103Medium 4.3Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to verify post ownership in the shared channel inbound sync handler, which allows an authenticated remote cluster to m…Jul 13, 2026
CVE-2026-10085Medium 5.4Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict the group_constrained channel flag to public and private channels that support group synchronization, whic…Jul 13, 2026
CVE-2026-4339Medium 6.5Mattermost versions 10.11.x <= 10.11.18, 11.6.x <= 11.6.3, 11.5.x <= 11.5.6 fail to validate attachment URLs against internal or private IP ranges in the Mattermost Agents plugin MCP server which all…Jun 26, 2026
CVE-2026-3472Low 3.5Mattermost versions 10.11.x <= 10.11.18, 11.6.x <= 11.6.3, 11.5.x <= 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated att…Jun 26, 2026
CVE-2026-8823Low 3.8Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to validate bot targets when demoting users to guests which allows a lower-privileged administrator to degrade arbitrary bot accounts vi…Jun 22, 2026
CVE-2026-9162Medium 4.3Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to invalidate cached authentication state for active WebSocket connections during global session rev…Jun 22, 2026
CVE-2026-8074Low 3.8Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to enforce bot-specific permission checks on the user active status endpoint, which allows a User Manager with user management write acc…Jun 22, 2026
CVE-2026-6673Medium 6.4Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to…Jun 22, 2026
Page 1 of 4Next

CVSS is the assigning CNA's score where it gives one, otherwise NVD's. The healthcare tag is a documented heuristic (a list of clinical and health IT vendors, and clinical terms in the description), not a classification. The CVE record is authoritative.

Your cookie choices
We use essential cookies to run this site, and, only with your consent, an advertising cookie from Google to measure whether our ads lead to sign-ups and subscriptions. See our for details.