CVE-2026-85891: Azure HDInsight Information Disclosure Vulnerability

High severity · published Oct 13, 2026

CVE-2026-85891

Azure HDInsight Information Disclosure Vulnerability

7.5

CVSS

0.9%

EPSS

On KEV

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

High

Integrity

None

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.9% · higher than 60% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Azure HDInsight · Microsoft

1.0 before 2606012120 · source: vendor

Affected product

Azure HDInsight

Microsoft

All Azure HDInsight CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-85891

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-85891

vendor-advisory

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85891