Description
Exposure of sensitive information to an unauthorized actor in Azure HDInsight allows an unauthorized attacker to disclose information over a network.
Published: 2026-10-13
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure (confidentiality compromise)
Action: Patch and Monitor
AI Analysis

Impact

The vulnerability allows an unauthorized actor to obtain sensitive data from an Azure HDInsight cluster by querying the system over the network. The disclosed information could include configuration details or other confidential data, leading to confidentiality loss for the affected organization. The weakness is classified as CWE-200, an information exposure flaw.

Affected Systems

Microsoft Azure HDInsight clusters are impacted. No specific version or patch level is listed, so all currently deployed clusters may be vulnerable until further product information is released by Microsoft.

Risk and Exploitability

The CVSS score of 7.5 indicates a high severity level. Because the EPSS score is not available, the likelihood of exploitation cannot be quantified. The vulnerability is not listed in the CISA KEV catalog, suggesting no documented active exploitation as of the last update. The attack likely occurs over the network, with a remote attacker capable of accessing the HDInsight endpoint. Inference: the vulnerability is accessed via standard network channels, implying remote exploitation is feasible if no proper network segmentation or firewall rules are in place.

Generated by OpenCVE AI on October 16, 2026 at 23:52 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the Microsoft security update that addresses CVE-2026-85891 as soon as it is released for your Azure HDInsight clusters
  • Restrict inbound traffic to HDInsight endpoints to trusted IP ranges and enforce role‑based access control to limit who can query cluster metadata
  • Enable logging and monitoring for anomalous data requests and review audit logs for signs of unauthorized information disclosure

Generated by OpenCVE AI on October 16, 2026 at 23:52 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 14 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 13 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description Exposure of sensitive information to an unauthorized actor in Azure HDInsight allows an unauthorized attacker to disclose information over a network.
Title Azure HDInsight Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft azure Hdinsights
Weaknesses CWE-200
CPEs cpe:2.3:a:microsoft:azure_hdinsights:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft azure Hdinsights
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}


Subscriptions

Microsoft Azure Hdinsights
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-31T18:05:10.890Z

Reserved: 2026-09-04T18:18:19.328Z

Link: CVE-2026-85891

cve-icon Vulnrichment

Updated: 2026-10-13T20:05:00.641Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-13T19:21:15.430

Modified: 2026-10-13T21:19:31.423

Link: CVE-2026-85891

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T17:15:06Z

Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor