CVE-2026-21529

Medium

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Azure HDInsights allows an authorized attacker to perform spoofing over a network.

SeverityMedium

CVSS5.7

Exploit probability—

Product

Microsoft Azure Hdinsight

PublishedFeb 10, 2026

First seenFeb 10, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

microsoft azure_hdinsight5.1 or later

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21529

Affected products

Product	Affected versions	Fixed in
microsoft azure_hdinsight	v < 5.1	5.1

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