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: 5,477 CVEs published, 360 critical, and 7 newly confirmed exploited. Add your stack to see whether any of them hit you.

Published in the last 7 days
5,477
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Critical, last 7 days
360
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Healthcare-tagged, last 7 days
5
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Known exploited (CISA KEV)
1,747
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Showing CVEs that name the product mattermost:mattermost_server. Show all products

163 CVEs, showing 101 to 150PreviousPage 3 of 4Next
CVESeverityTitlePublished
CVE-2026-5740High 7.5Mattermost 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 properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unaut…May 22, 2026
CVE-2026-5755Medium 6.5Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.2, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate the TIFF IFD offset in the image header before allocating memory, whic…May 22, 2026
CVE-2026-28735Medium 5.4Mattermost 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 validate the OAuth token scope on the callback which allows an authenticated Mattermost user to g…May 22, 2026
CVE-2026-4915Medium 6.5Mattermost 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 filter nil elements from outgoing webhook attachment payloads before processing, which allows an…May 25, 2026
CVE-2026-3433Medium 4.3Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel wh…Jun 12, 2026
CVE-2026-6046Medium 5.3Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to validate that a username returned during bot registration belongs to a bot account, which allo…Jun 12, 2026
CVE-2026-6689Medium 4.3Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creati…Jun 12, 2026
CVE-2026-6739High 7.2Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to require system-level permission when patching protected default system roles, which allows aut…Jun 12, 2026
CVE-2026-6961High 7.6Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sy…Jun 12, 2026
CVE-2026-7184Medium 6.5Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15 fail to sanitize the Remote Cluster API response on PATCH operations, which allows authenticated users with the {{manage_se…Jun 12, 2026
CVE-2026-7387High 8.8Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to require role-management authorization when setting the scheme_admin flag on group…Jun 12, 2026
CVE-2026-5139Medium 5.4Mattermost 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 enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab conne…Jun 22, 2026
CVE-2026-6062Medium 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 validate channel ownership of an existing subscription before applying edits which allows an auth…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
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-2026-9162Medium 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-2026-8823Low 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-2026-3472Low 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-2026-4339Medium 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-2026-10085Medium 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-2026-10103Medium 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-2026-10106Medium 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-2026-6850Medium 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-2026-9571Medium 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-2026-9597Medium 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-2026-9708Medium 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-2026-6541Medium 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-2026-9820Low 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-2026-9824Medium 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-2026-10600Medium 4.3Denial of service via unbounded document content extraction in Mattermost Server
Assigned by Mattermost
Jul 27, 2026
CVE-2026-10819Medium 6.5Mattermost Server Denial of Service via Animated GIF Emoji Upload
Assigned by Mattermost
Jul 27, 2026
CVE-2026-7521Medium 5.5SAML certificate deletion allows path traversal to delete arbitrary files outside the config directory
Assigned by Mattermost
Jul 28, 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-2026-16048Medium 6.3Channel member roles accept out-of-scope roles
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-2026-16047Medium 4.3Board channel linking without read channel permission validation
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-2026-16044Low 3.9Insufficient validation of guest board admin privileges on archive import
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-2026-10527Medium 6.3Boards plugin retains Board Admin rights for users demoted to System Guest
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-2026-9816High 8.3Insufficient server-side validation of board member role fields permits privilege escalation
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-2026-9693Low 3.5Mattermost thread memberships persist after team removal, exposing private channel thread metadata on re-invite
Assigned by Mattermost
Aug 17, 2026
CVE-2026-14259Medium 4.3Board archive import bypasses team board creation permissions
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-2026-12882Medium 4.3Mattermost Markdown autolink parsing denial of service
Assigned by Mattermost
Sep 14, 2026
CVE-2026-14344Medium 4.3Inconsistent authorization checks in Mattermost Boards endpoints
Assigned by Mattermost
Sep 14, 2026
CVE-2026-10542Medium 5.0Playbooks channel action update validation issue
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
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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.

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