What’s Vulnerable › Vulnerabilities
CVE-2026-21529: Azure HDInsight Spoofing Vulnerability
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-02-10 · updated 2026-08-19
- Weakness: CWE-79
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.
Affected products
- Microsoft Azure HDInsight: before 5.1 — fixed in 5.1
- Microsoft Azure HDInsight: from 1.0 before 5.1 — fixed in 5.1
How to fix
Upgrade to a fixed version: Microsoft Azure HDInsight 5.1; Microsoft Azure HDInsight 5.1. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-21529 or the next vulnerability affects your stack