What is CVE-2026-85891?

CVE-2026-85891 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Azure HDInsight Information Disclosure Vulnerability

Which CVE IDs does CVE-2026-85891 cover?

CVE-2026-85891 covers the following CVE IDs: CVE-2026-85891. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-85891?

CVE-2026-85891 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-85891?

CVE-2026-85891 affects 1 product, including: Azure HDInsight.

CVE-2026-85891HighCVSS 7.5

Azure HDInsight Information Disclosure Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 13, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-85891 →

📋 Description

Exposure of sensitive information to an unauthorized actor in Azure HDInsight allows an unauthorized attacker to disclose information over a network.

🎯 Affected products1

Azure HDInsight

✅ Remediation

KBRelease Notes (Security Update) — fixed build 2606012120

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85891
patchhttps://learn.microsoft.com/en-us/azure/hdinsight/hdinsight-hadoop-provision-linux-clusters
referencehttps://learn.microsoft.com/en-us/azure/hdinsight/hdinsight-release-notes