There is a lack of XSS escaping in the Spark History Server prior to 3.5.8 which allows a malicious Spark job to generat
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
Affected packages
- pyspark— 3.0.0 → 3.5.8
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- http://www.openwall.com/lists/oss-security/2026/09/01/4
- https://lists.apache.org/thread/k36prh3oxl1z6ov7w8rpmfnt07hmzw3v
Structured record: https://osv.dev/vulnerability/PYSEC-2026-3966
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