CVE-2026-32773

MEDIUM CVSS 3.1: 6.1 EPSS 0.56%
Updated Sep 08, 2026
Apache
Parameter Value
CVSS 6.1 (MEDIUM)
Affected Versions 3.0.0 — 3.5.8
Fixed In 3.5.8
Type CWE-80 (Improper Neutralization of Script-Related HTML Tags (XSS))
Vendor Apache
Public PoC No

There is a lack of XSS escaping in the Spark History Server prior to 3.5.8 which allows a malicious Spark job to generate arbitrary unescaped frontend code which could lead to a minimal privilege escalation in browser. Users are encouraged to upgrade to Spark 3.5.8 or later. This CVE is marked as "low" since the path to exploit requires both relatively high permissions (ability to launch a Spark job) and requires tricking a user with higher permissions to log in and visit the Spark history web page.

Users are encouraged to upgrade their Spark history servers to Spark 3.5.8 or later.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Apache Spark
cpe:2.3:a:apache:spark:*:*:*:*:*:*:*:*
3.0.0 3.5.8