Unrated severityNVD Advisory· Published Jul 17, 2026· Updated Jul 17, 2026
Posting a malicious markdown image crashes the Mattermost Desktop App
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
Affected products
1- Range: <=6.2.5.5.13, <=6.0.2.0
Patches
Vulnerability mechanics
References
1- mattermost.com/security-updatesmitrevendor-advisory
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