CVE-2026-32773

Apache Spark: XSS Vulnerability in Spark Web 3.5.4

Published Sep 2, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-9437-39hj-3c93 Apache Spark History Server allows stored cross-site scripting through unescaped application names
History
Type Values Removed Values Added
CPEs cpe:2.3:a:apache:spark:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache spark
Vendors & Products Apache
Apache spark
Type Values Removed Values Added
Description 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.
Title Apache Spark: XSS Vulnerability in Spark Web 3.5.4
Weaknesses CWE-80
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Sep 2, 2026, 12:43 PM
Reserved
Mar 13, 2026, 9:18 PM
Status
Analyzed
Published
Sep 2, 2026, 11:17 AM
Modified
Sep 8, 2026, 1:04 PM