VYPR
← All advisories
Medium severity6.3NVD Advisory· Published Jun 15, 2026· Updated Jun 16, 2026

CVE-2026-6517

CVE-2026-6517

Description

Mattermost Desktop App versions <=6.1 5.5.13.0 fail to restrict the allow list of domains to which NTLM credentials were forwarded to in the Mattermost Desktop App which allows any user on a server without the image proxy enabled to intercept other users credentials via embedding an image that routes to an external web server. Mattermost Advisory ID: MMSA-2026-00651

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

4
  • Mattermost/Desktopinferred2 versions
    <=6.1+ 1 more
    • (no CPE)range: <=6.1
    • (no CPE)range: <=5.5.13.0
  • Mattermost/Mattermost Desktop App2 versions
    cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*range: >=6.1.0,<=6.1.5
    • cpe:2.3:a:mattermost:mattermost_desktop:*:-:*:*:*:*:*:*range: <=5.13.0

Patches

Vulnerability mechanics

References

1

News mentions

0

No linked articles in our index yet.