CVE-2026-57106 Overview
CVE-2026-57106 is a Server-Side Request Forgery (SSRF) vulnerability in Microsoft Purview Data Governance. The flaw resides in the Data Quality component and allows an unauthenticated attacker to elevate privileges over a network. The vulnerability is tracked under CWE-918: Server-Side Request Forgery and carries a maximum CVSS score of 10.0 with a scope change, indicating impact beyond the vulnerable component.
Critical Impact
Unauthenticated network attackers can coerce Purview Data Governance into issuing arbitrary server-side requests, leading to privilege escalation and full compromise of confidentiality, integrity, and availability across trust boundaries.
Affected Products
- Microsoft Purview Data Governance
- Data Quality component within Microsoft Purview
- Microsoft Purview cloud service tenants
Discovery Timeline
- 2026-07-24 - CVE-2026-57106 published to NVD
- 2026-07-29 - Last updated in NVD database
Technical Details for CVE-2026-57106
Vulnerability Analysis
The vulnerability exists in the Data Quality feature of Microsoft Purview Data Governance. Attackers exploit the flaw by supplying crafted input that causes the service to issue outbound requests to attacker-chosen destinations. Because the request originates from within the Purview service context, it inherits privileges unavailable to the external attacker.
The scope change reflected in the CVSS vector indicates that a successful attack pivots from the Data Quality component into other trust zones. This enables retrieval of internal metadata, access to internal APIs, and interaction with cloud instance metadata services. The result is privilege elevation without any prior authentication or user interaction.
Root Cause
The root cause is insufficient validation of user-controllable URLs or endpoints consumed by the Data Quality processing pipeline [CWE-918]. The service accepts destination targets without enforcing allow-list validation, protocol restrictions, or resolution of loopback and internal network ranges. Consequently, the backend follows arbitrary requests supplied by the caller.
Attack Vector
The attack vector is network-based with low complexity and no privileges required. An unauthenticated attacker submits crafted requests to the exposed Data Quality endpoints. The vulnerable service then makes internal requests that reach management APIs, adjacent services, or credential endpoints, enabling privilege escalation across the Purview environment.
No verified public exploit code is available for CVE-2026-57106. See the Microsoft Security Update CVE-2026-57106 advisory for authoritative technical details.
Detection Methods for CVE-2026-57106
Indicators of Compromise
- Unexpected outbound HTTP or HTTPS requests originating from Purview Data Governance service components toward internal IP ranges or cloud metadata endpoints such as 169.254.169.254.
- Anomalous Data Quality job submissions containing URL parameters pointing to loopback, RFC1918, or link-local addresses.
- Purview audit log entries showing privilege changes or resource access shortly after Data Quality requests from unauthenticated or low-privilege principals.
Detection Strategies
- Inspect Purview activity logs and Azure Monitor telemetry for Data Quality operations that reference non-standard URI schemes or private network hostnames.
- Correlate outbound network flows from Purview service subnets against baseline destinations to identify SSRF pivot attempts.
- Alert on identity token requests or role assumption events immediately following Data Quality API activity.
Monitoring Recommendations
- Enable and forward Microsoft Purview diagnostic logs and Azure Activity Logs to a centralized analytics platform for correlation.
- Monitor Entra ID sign-in and role assignment events for principals associated with Purview managed identities.
- Track failed and successful requests to cloud instance metadata services from any Purview-associated workload.
How to Mitigate CVE-2026-57106
Immediate Actions Required
- Review the Microsoft Security Update CVE-2026-57106 advisory and confirm your Purview tenant has received the vendor-side fix.
- Audit Purview Data Governance managed identity permissions and remove roles that exceed operational requirements.
- Restrict network exposure of Purview Data Quality endpoints to trusted administrative networks where feasible.
Patch Information
Microsoft addressed CVE-2026-57106 as a service-side fix for Microsoft Purview Data Governance. Customers should validate remediation status via the Microsoft Security Response Center advisory. Because Purview is a cloud-hosted service, remediation is delivered by Microsoft and does not require customer-installed binaries.
Workarounds
- Apply conditional access policies to restrict Purview administrative and API access to known corporate identities and networks.
- Enforce least-privilege on Purview managed identities so that any SSRF-driven token misuse yields minimal blast radius.
- Block egress from Purview-connected workloads to cloud metadata IPs where the deployment architecture permits.
# Example: audit Purview role assignments for over-privileged identities
az role assignment list \
--scope "/subscriptions/<subscription-id>/resourceGroups/<rg>/providers/Microsoft.Purview/accounts/<purview-account>" \
--output table
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
