CVE-2026-21529: Microsoft Azure Hdinsight

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

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

Affected products

• Microsoft Azure Hdinsight: before 5.1 (fixed in 5.1)

Published 2026-02-10. Last modified 2026-06-17.