CVE-2026-85891: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in Microsoft Azure HDInsight
Description
CVE-2026-85891 is a high-severity vulnerability in Microsoft Azure HDInsight that allows unauthorized actors to expose sensitive information over a network. This vulnerability does not require user interaction or privileges to exploit. An official fix is available from Microsoft, and as this is a cloud service, Microsoft manages the remediation. There are no known exploits in the wild at this time.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Azure HDInsight
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85891 is an information exposure vulnerability (CWE-200) affecting Microsoft Azure HDInsight. It allows an unauthorized attacker to disclose sensitive information over a network without requiring privileges or user interaction. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity. Microsoft has published an official fix and manages remediation for this cloud-hosted service. No active exploitation has been reported.
Potential Impact
An unauthorized attacker can disclose sensitive information from Azure HDInsight over the network. This could lead to confidentiality breaches but does not impact integrity or availability. No known exploitation in the wild has been reported.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability and manages remediation for Azure HDInsight as a cloud service. Users should follow the guidance in the Microsoft security update guide to ensure their environments are protected.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-04T18:18:19.328Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85891","vendor":"Microsoft"}]
Threat ID: 6ace854a2cdf04f6569fec66
Added to database: 10/13/2026, 19:23:54 UTC
Last enriched: 10/14/2026, 02:49:41 UTC
Last updated: 10/14/2026, 02:49:41 UTC
Views: 3
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