Medium severity · published Sep 16, 2026
CVE-2026-75025
Mattermost Desktop local network access from server-rendered content
4.7
CVSS
0.2%
EPSS
No
On KEV
Description
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
through 6.2.2 · source: vendor
MD
Mattermost Desktop · Mattermost
6.2.0 before 6.2.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75025
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75025
Vendor Advisory
https://mattermost.com/security-updates
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