{"id":"CVE-2026-106078","state":"PUBLISHED","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","description":"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.","publishedAt":"2026-10-27T16:16:58.925Z","updatedAt":"2026-10-27T16:16:58.925Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"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","source":"hackerone"},"assigner":"hackerone","products":["Veeam Backup for Microsoft 365"],"affected":[{"vendor":"Veeam","product":"Backup for Microsoft 365","defaultStatus":"unaffected","versions":[{"version":"8.0","status":"affected","lessThanOrEqual":"8.6.0.1102","versionType":"semver"}]}],"references":["https://www.veeam.com/kb4957"],"weaknesses":["CWE-347"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/106xxx/CVE-2026-106078.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-106078","state":"PUBLISHED","datePublished":"2026-10-27T16:16:58.925Z","dateUpdated":"2026-10-27T16:16:58.925Z","assignerShortName":"hackerone","assignerOrgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","dateReserved":"2026-10-06T15:00:00.655Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Veeam","product":"Backup for Microsoft 365","defaultStatus":"unaffected","versions":[{"version":"8.0","status":"affected","lessThanOrEqual":"8.6.0.1102","versionType":"semver"}]}],"references":[{"url":"https://www.veeam.com/kb4957"}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"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","baseScore":6.9,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-347","type":"CWE","lang":"en","description":"CWE-347 Improper Verification of Cryptographic Signature"}]}],"providerMetadata":{"shortName":"hackerone","orgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","dateUpdated":"2026-10-27T16:16:58.925Z"}}}}}