Is CVE-2026-8075 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-8075?

CVE-2026-8075 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-8075

Description

Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermost Advisory ID: MMSA-2026-00668