GHSA-85qj-f5wg-rwp9: org.springframework.statemachine:spring-statemachine-kryo (CVE-2026-41862)

Spring Statemachine's Kryo-based persistence backends deserialize persisted state-machine contexts without enforcing a class allowlist

CVSS 8.8 HighEPSS 0.0076 · 55th percentile

Published by the GitHub Advisory Database at 23 Jun 2026, 21:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
org.springframework.statemachine:spring-statemachine-kryo	Maven	>=3.2.0, <=3.2.4 \|\| >=4.0.0, <4.0.2	4.0.2

Identifiers

GHSA-85qj-f5wg-rwp9 · CVE-2026-41862

Weakness (CWE)

CWE-502

Machine-written summary

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

spring-statemachine-kryo versions 3.2.0 through 3.2.4 and 4.0.0 through 4.0.1 deserialize persisted state-machine contexts from JPA, MongoDB, Redis and ZooKeeper backends without a class allowlist, which can lead to remote code execution inside the application JVM. The source does not say what access an attacker needs. Upgrade to version 4.0.2, which is the listed fix.

Written 2 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

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	CNA (vmware)

CISA KEV Not listed.
EPSS 0.0076, the 55th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:16 UTC First seen by agentprime
31 Oct 2026, 14:16 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.