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Fencer Vulns
medium 6.1

CVE-2026-32773 json

Apache Spark: XSS Vulnerability in Spark Web 3.5.4

published 2026-09-02 2 mo ago modified 2026-10-15 24 d ago also BIT-spark-2026-32773 , EUVD-2026-69899 , GHSA-9437-39hj-3c93 , PYSEC-2026-3966

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi pyspark 3.5.8
  • maven org.apache.spark:spark-core_2.12 3.5.8
  • maven org.apache.spark:spark-core_2.13 3.5.8
  • bitnami spark 3.5.8
  • Apache Software Foundation Apache Spark 3.5.8

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-32773 updated cvss 3.5

Apache Spark: Apache Spark: Cross-Site Scripting (XSS) leading to privilege escalation

  • Red Hat Ceph Storage 7 liborc 1.8.7-1.el9cp Red Hat Ceph Storage 8 liborc1 Red Hat Ceph Storage 9 liborc2, liborc 1.8.7-1.el9cp Red Hat OpenShift AI (RHOAI) rhoai/odh-spark-operator-rhel9, rhoai/odh-th06-cpu-torch210-py312-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhoai/odh-th06-rocm64-torch291-py312-rhel9, rhoai/odh-th06-cuda130-torch210-py312-rhel9, rhoai/odh-th06-cuda130-torch291-py312-rhel9
    affected: workaround, no fix available “Restrict Spark job submission and Spark History Server access to trusted users until affected Spark components can be updated.”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-th-torch-cpu-py312-rhel9, rhoai/odh-th-torch-cuda-py312-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
OSV 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi pyspark
>=3.0.0, <3.5.8
3.5.8
maven org.apache.spark:spark-core_2.12
>=3.0.0, <3.5.8
3.5.8
maven org.apache.spark:spark-core_2.13
>=3.0.0, <3.5.8
3.5.8
bitnami spark
>=3.0.0, <3.5.8
3.5.8

Affected products

  • Apache Software Foundation Apache Spark

Classification

Weakness
  • CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.