Microsoft has disclosed a critical Server-Side Request Forgery (SSRF) vulnerability in Azure Databricks, tracked as CVE-2026-33107, that allows an unauthenticated remote attacker to elevate privileges over a network, earning a maximum CVSS base score of 10.0.
Published on April 2, 2026, through the Microsoft Security Response Center (MSRC), this vulnerability highlights the growing exposure of cloud-native analytics platforms to server-side abuse techniques.
While Microsoft has confirmed no customer action is required, the flaw has been fully mitigated at the service level. The disclosure underscores the severity of SSRF vulnerabilities in large-scale, multi-tenant cloud environments.
Microsoft Azure Vulnerability
CVE-2026-33107 is rooted in CWE-918: Server-Side Request Forgery (SSRF), a class of vulnerability in which an attacker manipulates a server into making unauthorized requests to internal or external resources that the attacker cannot directly access.
In the context of Azure Databricks, Microsoft’s cloud-based unified analytics platform widely used for big data processing and machine learning, this means a threat actor could force Databricks servers to issue crafted HTTP requests targeting internal Azure infrastructure, metadata endpoints, or sensitive internal APIs.
The vulnerability carries a CVSS v3.1 base score of 10.0, the highest achievable rating, with a temporal score of 8.7 after accounting for exploit maturity and remediation status.
The attack vector is Network(AV:N), requiring no privileges (PR:N) and no user interaction (UI:N), meaning a completely anonymous external attacker could trigger this flaw simply by having network access to the target environment.
The Changed Scope (S:C) metric further amplifies the risk, indicating that exploitation extends beyond the Databricks component itself to impact other Azure services and resources.
How SSRF Becomes Privilege Escalation
SSRF vulnerabilities in cloud platforms are particularly dangerous because cloud infrastructure relies on internal metadata services and management APIs that are typically accessible only from within the environment.
Azure’s Instance Metadata Service (IMDS), accessible at the well-known internal IP address, can expose temporary credentials, subscription details, and managed identity tokens.
By exploiting CVE-2026-33107, an attacker could direct the Azure Databricks service to issue requests to these internal endpoints, thereby harvesting credentials or tokens that grant elevated access across the broader Azure tenant.
The Changed Scope indicator in the CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H precisely reflects this lateral movement potential, where a compromise of one component cascades into full Confidentiality, Integrity, and Availability (C:H/I:H/A:H) impact across dependent systems.
VulDB notes that exploitation is considered easy due to the lack of authentication barriers. It estimates the market value of a working exploit at approximately $5,000–$25,000 as of early April 2026, reflecting both the criticality and the current absence of public proof-of-concept code.
Affected Platform and Attack Surface
Azure Databricks is an enterprise-grade cloud analytics service deeply integrated into Azure’s ecosystem, connecting to Azure Data Lake Storage, Azure Synapse Analytics, Azure Key Vault, and a wide array of other services.
This interconnected architecture dramatically expands the blast radius of any SSRF exploitation; an attacker gaining access to internal service tokens could traverse these integrations to exfiltrate sensitive datasets, inject malicious data pipelines, or disrupt mission-critical analytics workloads.
No specific build versions or sub-components have been publicly identified as affected, which is consistent with Microsoft’s managed service disclosure model. The vulnerability exists at the platform level and was remediated by Microsoft directly.
Exploitation Status and Threat Landscape
As of the time of publication, CVE-2026-33107 has not been publicly disclosed before the advisory and has not been observed in active exploitation.
The Exploit Code Maturity is rated Unproven (E: U), and the Remediation Level is listed as Official Fix (RL:O) with a Confirmed (RC:C) report confidence.
However, the zero-authentication requirement and maximum CVSS score make this a high-priority flaw for security teams to monitor, particularly as threat actors frequently adapt cloud SSRF techniques following public disclosures.
Security researchers at Radar/Offseq note that Azure Databricks environments are often integrated with enterprise data stores and CI/CD pipelines, making SSRF-to-privilege-escalation chains a particularly potent attack pattern against organizations using the platform for production analytics.
Microsoft’s Response and Mitigation
Microsoft has confirmed that the vulnerability was fully mitigated server-side with no required action from customers or administrators.
The CVE disclosure follows Microsoft’s initiative toward greater transparency in cloud service vulnerability management, as outlined in its “Toward Greater Transparency: Unveiling Cloud Service CVEs” program.
This approach involves publishing CVEs for cloud-only vulnerabilities even when customers are not required to patch, allowing organizations to maintain accurate risk records and comply with internal security governance requirements.
The vulnerability was responsibly disclosed by the security team, and Microsoft’s MSRC acknowledged it for coordinated vulnerability disclosure. The CVE was formally assigned on March 17, 2026, and publicly published on April 2, 2026.
FAQ
Q1: Does CVE-2026-33107 require immediate patching by Azure Databricks users?
Microsoft has fully mitigated this vulnerability at the service level; no customer action, patching, or configuration change is required.
Q2: Can an attacker exploit this vulnerability without any credentials?
Yes, the CVSS vector confirms no privileges (PR: N) and no user interaction (UI: N) are required, making exploitation possible by any network-accessible unauthenticated attacker.
Q3: Has CVE-2026-33107 been actively exploited in the wild?
As of April 2, 2026, Microsoft confirms the vulnerability has not been publicly exploited, with exploit code maturity rated “Unproven.”
Q4: Why did Microsoft publish a CVE if no customer action is needed?
Microsoft published this CVE to provide transparency under its Cloud Service CVE program, helping organizations maintain accurate security records and satisfy compliance requirements.
Site: thecybrdef.com
About the Author
