Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache Spark spark-core is vulnerable in the 2.13 and 2.12 Scala builds: spark-core_2.13 from 4.0.0 before 4.0.1 and before 3.5.7, and spark-core_2.12 before 3.5.7. Older spark-core_2.11, spark-core_2.10 and spark-core_2.9.3 releases are also affected, and no fixed version is listed for them. An attacker who can write to the Spark event logs directory can cause the Spark History Server to deserialize crafted JSON that instantiates arbitrary classes, leading to code execution on the host. Upgrade spark-core_2.13 to 4.0.1 or 3.5.7, and spark-core_2.12 to 3.5.7.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.8 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.063, the 93rd percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:17 UTC First seen by agentprime
- 31 Oct 2026, 14:17 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-jwp6-cvj8-fw65
- OSV: GHSA-jwp6-cvj8-fw65
- nvd.nist.gov/vuln/detail/CVE-2025-54920
- github.com/apache/spark/pull/51312
- github.com/apache/spark/pull/51323
- github.com/apache/spark
- issues.apache.org/jira/browse/SPARK-52381
- lists.apache.org/thread/4y9n0nfj7m68o2hpmoxgc0y7dm1lo02s
- www.openwall.com/lists/oss-security/2026/03/13/4