Apache Spark: XSS Vulnerability in Spark Web 3.5.4 (CVE-2026-32773) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-32773

Apache Spark: XSS Vulnerability in Spark Web 3.5.4

Answer in brief

CVE-2026-32773 records a Unknown severity vulnerability in Apache Spark: XSS Vulnerability in Spark Web 3.5.4. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache Spark (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 2, 2026Updated Sep 2, 2026Source checked Sep 2, 2026First seen by HOL Sep 2, 2026Material review Sep 2, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/Apache Spark (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Apache Software Foundation/Apache Sparkgeneric	>=3.0.0 <3.5.8	3.5.8

Recommended response

Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/Apache Spark.
Review the reported fix. Update Apache Software Foundation/Apache Spark to 3.5.8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 2, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.