Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-6p6v-m64v-jx8q

This issue affects Apache Spark versions before 3.4.4, 3.5.2 and 4.0.0.

CVSS 6.5 MediumEPSS 0.0020 · 10th percentile

Published by the GitHub Advisory Database at 15 Oct 2025, 08:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
pysparkPyPI<3.4.4 || >=3.5.0, <3.5.23.4.4, 3.5.2
Identifiers
GHSA-6p6v-m64v-jx8q · CVE-2025-55039 · PYSEC-2025-184
Weakness (CWE)
CWE-326 · CWE-347
Tags
Published
15 Oct 2025
Updated
10 Jun 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Apache Spark's pyspark package, versions before 3.4.4 and from 3.5.0 before 3.5.2, is affected. When spark.network.crypto.enabled is true and spark.network.crypto.cipher is not set, Spark uses AES in CTR mode, which encrypts without authenticating. A man-in-the-middle attacker on the network path can alter RPC traffic undetected. Upgrade to pyspark 3.4.4 or 3.5.2. Alternatively, set spark.network.crypto.cipher to AES/GCM/NoPadding or enable SSL with spark.ssl.enabled set to true.

Written 3 Nov 2026.

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

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N OSV
  • CISA KEV Not listed.
  • EPSS 0.0020, the 10th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.