{"uuid": "073fc731-ede0-4115-8a34-9394c6b55514", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-4858", "type": "seen", "source": "https://bsky.app/profile/securitycyberuk.bsky.social/post/3motmhez5pf2z", "content": "\ud83d\udea8  ALERT: CVE-2026-4858\n\nCVSS 8.0/10\n\n\ud83d\udccb WHAT IT IS:\nMattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user  to call an arbitrary API via system admin Mattermost auth t", "creation_timestamp": "2026-06-22T00:20:06.134949Z"}