CVE-2026-1628

4.6 mediumEPSS 0.2%

Medium (4.6) in mattermost mattermost desktop. EPSS 0.2% chance of exploitation in the next 30 days.

Mattermost Desktop App versions <=5.13.3 fail to attach listeners restricting navigation to external sites within the Mattermost app which allows a malicious server to expose preload script functionality to untrusted servers via having a user open an external link in their Mattermost server. Mattermost Advisory ID: MMSA-2026-00596

Severity

CVSS 3.1

4.6 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-31)
CWE: CWE-829
Published: 2026-03-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mattermost:mattermost_desktop

References

https://mattermost.com/security-updates

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