Spring Statemachine's Kryo-based persistence backends deserialize persisted state-machine contexts without enforcing a class allowlist
CVE-2026-41862GHSA-85qj-f5wg-rwp9
What to do
Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.
This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.
Affected packages
Maven org.springframework.statemachine:spring-statemachine-kryo
- Affected
- >= 3.2.0, <= 3.2.4>= 4.0.0, <= 4.0.1
- Fixed in
- 4.0.2
Sources
- GitHub Advisory Database and maintainer security advisories on GitHub
GitHub-reviewed advisory GHSA-85qj-f5wg-rwp9 lists affected ranges: Maven org.springframework.statemachine:spring-statemachine-kryo >=3.2.0 =4.0.0 <=4.0.1
VerifiedObserved Structured GitHub Advisory Database record (type=reviewed) from the GitHub REST API.
Severity and exploitation
- Exploitation
- No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
- CVSS
- 8.8 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- CVE-2026-41862: 0.76% estimated exploitation activity in the next 30 days; percentile 55.41 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description
As published by the source; long descriptions are shortened.
Spring Statemachine's Kryo-based persistence backends (JPA, MongoDB, Redis and ZooKeeper) deserialise persisted state-machine contexts without enforcing a class allowlist (CWE-502, deserialisation of untrusted data), which can lead to remote code execution inside the application JVM. Affected versions: Spring Statemachine 4.0.0 through 4.0.1 Spring Statemachine 3.2.0 through 3.2.4
Dates and revisions
- Published by the source
- Last modified by the source
- Source last checked
- Revision 1 · created ·
Published from ghsa record GHSA-85qj-f5wg-rwp9
Agent brief
Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.
# Patch Next advisory brief: CVE-2026-41862 Advisory: Spring Statemachine's Kryo-based persistence backends deserialize persisted state-machine contexts without enforcing a class allowlist IDs: CVE-2026-41862, GHSA-85qj-f5wg-rwp9 Record: https://patchnext.com/advisories/cve-2026-41862 (revision 1, source checked 26 Oct 2026, 16:55 UTC) Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected. Severity: High (CVSS 8.8) Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV. Vendor response: Partial vendor fix; fixed versions by package: org.springframework.statemachine:spring-statemachine-kryo 4.0.2. A vendor fix does not mean a deployment is fixed. ## Affected components - Maven org.springframework.statemachine:spring-statemachine-kryo: affected >= 3.2.0, <= 3.2.4; >= 4.0.0, <= 4.0.1; fixed in 4.0.2 ## Suggested inspection (read-only) - Maven org.springframework.statemachine:spring-statemachine-kryo: check the installed version with your package manager. ## Supported action No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything. ## Required regression checks - Run the test suite and a production build. - Exercise the features that depend on org.springframework.statemachine:spring-statemachine-kryo. - Repeat the inspection and confirm that only fixed versions remain installed. ## Rollback considerations - Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward. ## Unresolved questions - Which deployments run an affected version? - Exploitation status can change. Check again before lowering the priority. - Mark the work resolved only after the fixed version is verified in production. ## Sources - Verified: https://github.com/advisories/GHSA-85qj-f5wg-rwp9 (GitHub-reviewed advisory GHSA-85qj-f5wg-rwp9 lists affected ranges: Maven org.springframework.statemachine:spring-statemachine-kryo >=3.2.0 =4.0.0 <=4.0.1) Commands are suggestions: review each one before running it.
Loading voting…