Azure HDInsight Ambari Elevation of Privilege Vulnerability
Published September 8, 2026Updated September 8, 2026
Source data
Overview
Improper neutralization of special elements used in an os command ('os command injection') in Azure HDInsights allows an authorized attacker to elevate privileges over a network.
Impact & technical details
Elevation of Privilege
What privileges an attacker could gain with a successful exploitation? An attacker with the Service Operator role in Azure HDInsight Ambari can exploit a command injection flaw in the HDFS REBALANCEHDFS custom command to execute arbitrary system commands as the hdfs user on the NameNode.
What action should customers take to address this vulnerability? Customers should recreate affected Azure HDInsight clusters so they are provisioned with the updated image. The fix is included in the June 29, 2026 Azure HDInsight release , image 2606012120 , and later images. For instructions, see Set up clusters in HDInsight with Hadoop, Spark, and Kafka .
- CVSS base score
- 7.2 / 10
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Highest base score supplied by MSRC for this record; the vector belongs to that score. Ratings can vary by product. Microsoft Important is displayed as High; Moderate is displayed as Medium.
Affected products
- Azure HDInsight
Source guidance
Remediation
- Release Notes
At least one Microsoft vendor-fix reference is available. Check each affected product for its applicable update, prerequisites, and supported version.
GTP recommendation · Rule-based guidance
Recommended next step
Review affected Microsoft products and apply the applicable security updates through your organization's normal patch-management process. Confirm availability and prerequisites in the Microsoft advisory.
Authoritative sources & updates
Findings and update information come from the linked publishers. GTP compiles the public record and provides the recommendation above. CVSS ratings shown here come from Microsoft. NVD references provide additional public context.
Managed by GTP?
Griffin Technology Partners managed customers may receive additional environment-specific security guidance and remediation assistance through their managed services relationship.
Security bulletins are provided for informational purposes and compiled from authoritative public sources. Vulnerability applicability varies by environment. Validate affected products, configuration, compatibility requirements, and vendor guidance before making production changes.