7508 matches found
CVE-2026-10600 Denial of service via unbounded document content extraction in Mattermost Server
Mattermost 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 an authenticated user with file-upload permission to degrade file uploads for all users on the server v...
CVE-2026-10600
Mattermost Server vulnerability CVE-2026-10600 affects multiple release lines (Mattermost 11.8.x up to 11.8.0, 11.7.x up to 11.7.3, 11.6.x up to 11.6.5, 10.11.x up to 10.11.20). An authenticated user with file-upload permission can trigger unbounded server-side document content extraction, failin...
CVE-2026-9602
Mattermost Desktop App versions =6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00...
CVE-2026-8075
Mattermost Desktop App versions =6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermo...
CVE-2026-8075
Mattermost Desktop App versions =6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermo...
EUVD-2026-45157
Mattermost Desktop App versions =6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermo...
CVE-2026-8075 Posting a malicious markdown image crashes the Mattermost Desktop App
Mattermost Desktop App versions =6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermo...
CVE-2026-8075 Posting a malicious markdown image crashes the Mattermost Desktop App
Mattermost Desktop App versions =6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermo...
CVE-2026-9602 Mattermost Desktop App crashes when malformed arguments are provided to some exposed IPC methods
Mattermost Desktop App versions =6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00...
CVE-2026-9602 Mattermost Desktop App crashes when malformed arguments are provided to some exposed IPC methods
Mattermost Desktop App versions =6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00...
CVE-2026-9602
Mattermost Desktop App vulnerable versions:
CVE-2026-9602
Mattermost Desktop App versions =6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the Desktop App which allows a malicious server owner to crash the Mattermost Desktop App via changing the payload of a method to a malformed one. Mattermost Advisory ID: MMSA-2026-00...
Mattermost Server 10.11.x < 10.11.20 / 11.6.x < 11.6.5 / 11.7.x < 11.7.2 Incorrect Authorization (MMSA-2026-00653)
The version of Mattermost Server installed on the remote host is affected by a vulnerability as referenced in the MMSA-2026-00653 advisory. - Mattermost 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...
CVE-2026-6541
Mattermost 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 access to alter another user’s playbook metric settings via a crafted import or update request with a...
CVE-2026-6541
CVE-2026-6541 affects Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, and 10.11.x
CVE-2026-6541 Unscoped updates to other playbooks' metric configuration
Mattermost 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 access to alter another user’s playbook metric settings via a crafted import or update request with a...
CVE-2026-9820
Mattermost versions 11.7.x <= 11.7.2 and 10.11.x
CVE-2026-9820 Mattermost schemes teams endpoint exposes private team invite IDs
Mattermost 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 for private teams and use them to join or share access to those teams via the scheme teams API...
CVE-2026-9824
Mattermost v11.7.x ≤ 11.7.2, v11.6.x ≤ 11.6.4, and v10.11.x ≤ 10.11.19 are affected by CVE-2026-9824 due to a missing check of the manage_shared_channels permission in the /share-channel autocomplete handler. This allows an authenticated user without that permission to enumerate remote cluster co...
CVE-2026-9824 Remote cluster metadata enumeration via /share-channel autocomplete
Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to check the managesharedchannels permission in the /share-channel autocomplete handler, which allows an authenticated user without that permission to enumerate configured remote cluster connection metadata via slash...