Low severity2.6NVD Advisory· Published Sep 17, 2026
CVE-2026-75588
CVE-2026-75588
Description
Mattermost Desktop App versions <=6.2 6.2.2.0 fail to validate the URL scheme when checking whether a target URL is internal to the connected server, which allows a network-positioned attacker to load a plugin popout window over an insecure connection via a link using a downgraded URL scheme. Mattermost Advisory ID: MMSA-2026-00717
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Affected products
1- Range: <=6.2.2.0
Patches
Vulnerability mechanics
References
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