Known Vulnerabilities for products from Mattermost

Listed below are 20 of the newest known vulnerabilities associated with the vendor "Mattermost".

These CVEs are retrieved based on exact matches on listed vendor information (CPE data) as well as a keyword search to ensure the newest vulnerabilities with no officially listed vendor information are still displayed.

Data on known vulnerable products is also displayed based on information from known CPEs, each product links to its respective vulnerability page.

Known Vulnerabilities

CVE Shortened Description Severity Publish Date Last Modified
CVE-2026-96260 json Not Provided 2026-09-22 2026-09-23
CVE-2026-96259 json Not Provided 2026-09-22 2026-09-23
CVE-2026-95666 json Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to limit the length of the... Not Provided 2026-09-22 2026-10-07
CVE-2026-91181 json Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 Fail to sanitize Team objects r... Not Provided 2026-09-14 2026-10-07
CVE-2026-86349 json Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.8, 10.11.x <= 10.11.22 fail to limit the nesting depth... Not Provided 2026-09-14 2026-10-07
CVE-2026-86348 json Not Provided 2026-09-14 2026-09-14
CVE-2026-84713 json Not Provided 2026-09-23 2026-10-16
CVE-2026-82920 json Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7 fail to enforce authorization boundaries on the acce... Not Provided 2026-09-14 2026-10-07
CVE-2026-75588 json Mattermost Desktop App versions <=6.2 6.2.2.0 fail to validate the URL scheme when checking whether a target URL is internal ... Not Provided 2026-09-17 2026-10-13
CVE-2026-75587 json Mattermost Desktop App versions <=6.2 6.2.2.0 fail to redact the pre-auth secret when generating a diagnostics report, which ... Not Provided 2026-08-17 2026-08-19
CVE-2026-75025 json Mattermost Desktop App versions <=6.2 6.2.2.0 Fixed an issue where Mattermost Desktop did not sufficiently restrict server-re... Not Provided 2026-09-16 2026-10-13
CVE-2026-28759 json Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate that a remote cluster has access... Not Provided 2026-05-18 2026-10-14
CVE-2026-28741 json Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to validate CSRF tokens on... Not Provided 2026-04-15 2026-04-22
CVE-2026-28736 json ** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded files. This all... Not Provided 2026-04-03 2026-10-23
CVE-2026-28735 json 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 validate the OAuth toke... Not Provided 2026-05-22 2026-07-23
CVE-2026-28732 json Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 Fail to enforce slash command trigger-word unique... Not Provided 2026-05-18 2026-10-14
CVE-2026-27769 json Mattermost versions 10.11.x <= 10.11.12 fail to validate whether users were correctly owned by the correct Connected Workspac... Not Provided 2026-04-15 2026-04-22
CVE-2026-25773 json ** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to sanitize category IDs before incorporating them into dynamic ... Not Provided 2026-04-03 2026-07-24
CVE-2026-24661 json Mattermost Plugins versions <=2.1.3.0 fail to limit the request body size on the {{/changes}} webhook endpoint which allows a... Not Provided 2026-04-09 2026-04-17
CVE-2026-22880 json Mattermost Mobile Apps versions <=2.37 11.4 2.0.37 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to properly validate the SSO authenti... Not Provided 2026-05-21 2026-08-06
Results limited to 20 most recent vulnerabilities

Known software with vulnerabilities from Mattermost

Type Vendor Product Version
ApplicationMattermostMattermost-
ApplicationMattermostMattermost Desktop3.4.0
ApplicationMattermostMattermost Mobile1.26.0
ApplicationMattermostMattermost Packages5.16.3
ApplicationMattermostMattermost Plugins5.13.0
ApplicationMattermostMattermost Server0.5.0
ApplicationMattermostServer5.19.0

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