CVE-2026-8075 — Posting a malicious markdown image crashes the Mattermost Desktop App
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 c…
Published: 2026-07-17 · CVSS: 6.5 · CVSS 3.1
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
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7