{"id":"CVE-2026-106078","title":"A vulnerability allowing an unauthenticated attacker to bypass REST API authentication with a forged federation token and receive responses from REST API endpoints that do not call the Veeam Backup for Microsoft 365 backup service.","summary":"A vulnerability allowing an unauthenticated attacker to bypass REST API authentication with a forged federation token and receive responses from REST API endpoints that do not call the Veeam Backup for Microsoft 365 backup service.","severity":"medium","cvss":6.9,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-347"],"vendor":"Veeam","product":"Backup for Microsoft 365","affected":["backup_for_microsoft_365 >= 8.0 <= 8.6.0.1102"],"published":"2026-10-27","updated":"2026-10-27","sourceUpdated":"2026-10-27T16:16:58.925Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106078","references":[{"url":"https://www.veeam.com/kb4957"}],"tags":["cve.org"],"ingestedAt":"2026-10-27T16:32:34.388Z","slug":"CVE-2026-106078","body":"## Overview\n\nA vulnerability allowing an unauthenticated attacker to bypass REST API authentication with a forged federation token and receive responses from REST API endpoints that do not call the Veeam Backup for Microsoft 365 backup service.\n\n## Affected\n\n- `backup_for_microsoft_365 >= 8.0 <= 8.6.0.1102`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":38,"depthScoreParts":{"impact":38,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}