CVE-2026-75025 is a vulnerability in MatterMost
Published on September 16, 2026
Mattermost Desktop local network access from server-rendered content
Mattermost Desktop App versions <=6.2 6.2.2.0 Fixed an issue where Mattermost Desktop did not sufficiently restrict server-rendered content from accessing local or private network resources. Thanks to game0v3r for contributing to this improvement under the Mattermost responsible disclosure policy. Mattermost Advisory ID: MMSA-2026-00698
Vulnerability Analysis
CVE-2026-75025 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
Origin Validation Error
The software does not properly verify that the source of data or communication is valid.
Products Associated with CVE-2026-75025
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Affected Versions
Mattermost:- Before and including 6.2.2 is affected.
- Version 6.3.0 is unaffected.
- Version 6.2.3.0 is unaffected.