CVE-2026-21529 is a medium-severity cross-site scripting (XSS) vulnerability affecting Microsoft Azure HDInsight. An authorized attacker can exploit this flaw over a network to perform spoofing. The CVSS score of 5.4 indicates a low attack complexity and privilege requirement, but also a limited impact on confidentiality and integrity. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, suggesting awareness within the security community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.0, < 5.1CPE match | cpe:2.3:a:microsoft:azure_hdinsight:*:*:*:*:*:*:*:* | ||
< 5.1CPE matchmatch criteria | cpe:2.3:a:microsoft:azure_hdinsight:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.