CVE-2026-106078

Unauthenticated REST API Authentication Bypass via Forged Federation Token

Published Oct 27, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Veeam
Veeam backup For Microsoft 365
Vendors & Products Veeam
Veeam backup For Microsoft 365
Type Values Removed Values Added
Title Unauthenticated REST API Authentication Bypass via Forged Federation Token
Type Values Removed Values Added
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.
Weaknesses CWE-347
References
Metrics cvssV4_0

{'score': 6.9, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
hackerone
Published
Updated
Nov 4, 2026, 5:57 PM
Reserved
Oct 6, 2026, 3:00 PM
Status
Awaiting Analysis
Published
Oct 27, 2026, 5:16 PM
Modified
Nov 4, 2026, 6:17 PM