CVE-2026-32773
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pysparkPyPI | >= 3.0.0, < 3.5.8 | 3.5.8 |
org.apache.spark:spark-core_2.12Maven | >= 3.0.0, < 3.5.8 | 3.5.8 |
org.apache.spark:spark-core_2.13Maven | >= 3.0.0, < 3.5.8 | 3.5.8 |
Affected products
2- Range: <3.5.8
Patches
Vulnerability mechanics
References
9- www.openwall.com/lists/oss-security/2026/09/01/4nvdMailing ListThird Party AdvisoryWEB
- github.com/advisories/GHSA-9437-39hj-3c93ghsaADVISORY
- lists.apache.org/thread/k36prh3oxl1z6ov7w8rpmfnt07hmzw3vnvdMailing ListVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-32773ghsaADVISORY
- github.com/apache/spark/commit/3c83c2c6a22fe384280b99bb753b14800b7e27e1ghsaWEB
- github.com/apache/spark/commit/e739b7d349dbd41b78d49bc8086cab63db057e14ghsaWEB
- github.com/apache/spark/pull/52851ghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/pyspark/PYSEC-2026-3966.yamlghsaWEB
- issues.apache.org/jira/browse/SPARK-53747ghsaWEB
News mentions
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