CVE-2026-21529: Azure HDInsight Spoofing Vulnerability
Published Feb 10, 2026
·Updated
Azure HDInsight Spoofing Vulnerability
Other sources
Improper neutralization of input during web page generation ('cross-site scripting') in Azure HDInsights allows an authorized attacker to perform spoofing over a network.
— Microsoft
Affected Software
2 affected componentsFixes available
Microsoft Azure HDInsight
Microsoft Azure HDInsight<5.1
Event History
Feb 10, 2026
CVE Published
via Microsoft·04:00 PM
Data Sourced
via Microsoft·04:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·04:00 PM
Affected Software
Updated
via Microsoft·04:00 PM
Description
CVE Published
via MITRE·05:51 PM
Data Sourced
via MITRE·05:51 PM
DescriptionSeverity
Data Sourced
via NVD·06:16 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-21529?
CVE-2026-21529 is categorized as a spoofing vulnerability in Azure HDInsight.
2
How does CVE-2026-21529 affect Azure HDInsight users?
CVE-2026-21529 can allow an unauthorized attacker to perform spoofing attacks over the network on Azure HDInsight.
3
Are there patches available for CVE-2026-21529?
Yes, Microsoft provides patches for CVE-2026-21529, which can be accessed through Azure HDInsight release notes.
4
What can I do to mitigate the risks from CVE-2026-21529?
To mitigate the risks from CVE-2026-21529, it's recommended to apply the provided patches and ensure proper input validation.
5
Who is affected by CVE-2026-21529?
Users of Microsoft Azure HDInsight versions below 5.1 are affected by CVE-2026-21529.