Unrated severityNVD Advisory· Published Mar 2, 2026· Updated Mar 2, 2026
Mattermost allows external websites to open within the app, exposing preload functionality to non-trusted sites.
CVE-2026-1628
Description
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- Range: <=5.13.3
- Range: 0
Patches
Vulnerability mechanics
References
1- mattermost.com/security-updatesmitrevendor-advisory
News mentions
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