What is CVE-2026-85891?

CVE-2026-85891 is a high-severity vulnerability in Microsoft Azure Hdinsight, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-10-13.

How severe is CVE-2026-85891?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Microsoft Azure Hdinsight

CVE-2026-85891

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

Vulnerability class: Information Disclosure

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft Azure Hdinsight

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

Azure HDInsight Information Disclosure Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-85891?: CVE-2026-85891 is a high-severity vulnerability in Microsoft Azure Hdinsight, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-10-13.
How severe is CVE-2026-85891?: High severity. CVSS v3 base score is 7.5 out of 10.