Cross-Site Scripting Vulnerability in Spark History Server by Apache
CVE-2026-32773

6.1MEDIUM

Key Information:

Vendor

Apache
Status
Apache Spark
Vendor
CVE Published:
2 September 2026

What is CVE-2026-32773?

A Cross-Site Scripting (XSS) vulnerability exists in the Apache Spark History Server versions before 3.5.8. This vulnerability allows a malicious Spark job to execute arbitrary unescaped frontend code. As a result, it can lead to potential privilege escalation when users with higher permissions inadvertently access the infected Spark history web page. It is essential for users to upgrade to Spark 3.5.8 or later to mitigate the risks associated with this vulnerability.

Affected Version(s)

Apache Spark 3.0.0 < 3.5.8

References

https://lists.apache.org/thread/k36prh3oxl1z6ov7w8rpmfnt0...
vendor-advisory

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yann Gourio
.