Known Vulnerabilities for Mattermost Server by Mattermost

Listed below are 10 of the newest known vulnerabilities associated with "Mattermost Server" by "Mattermost".

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

Data on known vulnerable versions is also displayed based on information from known CPEs

Known Vulnerabilities

CVE Shortened Description Severity Publish Date Last Modified
CVE-2026-96260 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 enforce a request body ... Not Provided 2026-09-22 2026-09-23
CVE-2026-96259 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 apply the internal-conn... Not Provided 2026-09-22 2026-09-23
CVE-2026-95666 json Not Provided 2026-09-22 2026-10-07
CVE-2026-93851 json Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10 fail to validate the target post ID in the Agents p... Not Provided 2026-10-28 2026-10-30
CVE-2026-93850 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 bind the volume of text... Not Provided 2026-10-26 2026-10-26
CVE-2026-93849 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 Mattermost fail to apply alloca... Not Provided 2026-10-26 2026-10-26
CVE-2026-93848 json Mattermost versions 11.7.x <= 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint r... Not Provided 2026-10-26 2026-10-26
CVE-2026-93847 json Not Provided 2026-10-26 2026-11-02
CVE-2026-91181 json 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 2026-09-14
Results limited to 10 most recent vulnerabilities

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationMattermostMattermost Server5.9.8
ApplicationMattermostMattermost Server5.9.8
ApplicationMattermostMattermost Server5.9.7
ApplicationMattermostMattermost Server5.9.7
ApplicationMattermostMattermost Server5.9.6
ApplicationMattermostMattermost Server5.9.6
ApplicationMattermostMattermost Server5.9.5
ApplicationMattermostMattermost Server5.9.5
ApplicationMattermostMattermost Server5.9.4
ApplicationMattermostMattermost Server5.9.4
ApplicationMattermostMattermost Server5.9.3
ApplicationMattermostMattermost Server5.9.3
ApplicationMattermostMattermost Server5.9.2
ApplicationMattermostMattermost Server5.9.2
ApplicationMattermostMattermost Server5.9.1
ApplicationMattermostMattermost Server5.9.1
ApplicationMattermostMattermost Server5.9.0
ApplicationMattermostMattermost Server5.9.0
ApplicationMattermostMattermost Server5.9.0
ApplicationMattermostMattermost Server5.9.0
Results limited to 20 most recent known configurations

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