Cross-site scripting in Apache Spark - CVE-2026-32773
Published: September 2, 2026
Vulnerability identifier: #VU146744
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-32773
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to escalate privileges in the browser.
The vulnerability exists due to cross-site scripting in the Spark History Server web interface when rendering job-supplied content. A remote user can submit a malicious Spark job containing unescaped frontend code to escalate privileges in the browser.
User interaction is required, as a higher-privileged user must log in and visit the Spark history web page.
Affected software
Apache Spark
How to mitigate CVE-2026-32773
Install security update from vendor's website.
Apache Spark - update to 3.5.8