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CVE-2026-32773— Apache Spark: XSS Vulnerability in Spark Web 3.5.4

Quick assessment

Affected
Apache Software Foundation Apache Spark
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Spark是美国Apache基金会的一款分布式大数据处理引擎。 Apache Spark 3.5.8之前版本存在跨站脚本漏洞，该漏洞源于缺少XSS转义，可能导致恶意Spark作业生成任意未转义的前端代码，进而导致浏览器中的权限提升。

AI Predicted 4.7 Difficulty: Moderate EPSS 0.41% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Spark 3.0.0< 3.5.8 affected
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I. Basic Information for CVE-2026-32773

Vulnerability Information
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Vulnerability Title
Apache Spark: XSS Vulnerability in Spark Web 3.5.4
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Spark 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Spark是美国Apache基金会的一款分布式大数据处理引擎。 Apache Spark 3.5.8之前版本存在跨站脚本漏洞，该漏洞源于缺少XSS转义，可能导致恶意Spark作业生成任意未转义的前端代码，进而导致浏览器中的权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Spark 3.0.0 ~ 3.5.8 -

II. Public POCs for CVE-2026-32773

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III. Intelligence Information for CVE-2026-32773

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Mailing List Discussions for CVE-2026-32773 (1)

IV. Related Vulnerabilities

Same product: Apache Spark
Same vendor: Apache Software Foundation
Same weakness: CWE-80

V. Comments for CVE-2026-32773

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