PT-2026-94365 · Mattermost · Mattermost

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CVE-2026-75588

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Published

2026-09-17

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Updated

2026-09-17

CVSS v3.1

2.6

Low

VectorAV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
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

Fix

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Weakness Enumeration

Related Identifiers

CVE-2026-75588

Affected Products

Mattermost