# CVE-2026-47850: Spring Data REST version property not preserved on immutable PUT

Source: https://junglewise.ai/threats/cve-2026-47850-spring-data-rest-version-property-not-preserved-on-immutable-put  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-27. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-47850 · Severity: medium · CVSS 4.3 · Published 2026-08-27

Spring Data REST is a framework that allows developers to expose databases over HTTP REST APIs. When handling update requests (HTTP PUT) against immutable aggregate root objects, the framework fails to preserve the version field (@Version), which tracks object revisions for concurrency control. This could lead to lost updates or data inconsistency when multiple clients attempt concurrent modifications to the same entity.

Technologies: [VMware Spring Data REST](https://junglewise.ai/threats/technologies/spring-data-rest). Vendors: [VMware](https://junglewise.ai/threats/vendors/vmware).

## Quick answers

**Is CVE-2026-47850 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47850 being exploited in the wild.

**How severe is CVE-2026-47850?** Medium severity, with a CVSS score of 4.3, published 27 August 2026.

**Which products and versions are affected?** VMware Spring Data REST 5.1.0, 5.0.0–5.0.6, 4.5.0–4.5.12, 4.0.0–4.4.15, 3.7.20 and earlier.

**Is there a fix for CVE-2026-47850?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-47850 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-47850?** Check whether you run VMware Spring Data REST at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability exists in Spring Data REST's HTTP PUT handler for immutable entity types. When processing a PUT request against an aggregate root marked with @Version (used for optimistic locking), the framework does not preserve the persisted version property during serialization/deserialization. The root cause is improper handling of immutable target types during entity update operations. An attacker with network access to a REST endpoint can craft concurrent PUT requests to exploit optimistic locking bypass, potentially causing data inconsistency or lost updates. The issue affects multiple versions across the 3.x, 4.x, and 5.x release lines; patches are expected from the Spring team.

## Affected products

- VMware Spring Data REST 5.1.0, 5.0.0–5.0.6, 4.5.0–4.5.12, 4.0.0–4.4.15, 3.7.20 and earlier

## Timeline

- 2026-08-27: disclosed

## References

- [https://spring.io/security/cve-2026-47850](https://spring.io/security/cve-2026-47850)

## Related threats

- [Spring Data REST identifier and version property mutation via JSON Patch](https://junglewise.ai/threats/cve-2026-47849-spring-data-rest-identifier-and-version-property-mutation-via)
- [VMware Spring Data REST improper access control in Querydsl integration](https://junglewise.ai/threats/cve-2026-41837-vmware-spring-data-rest-improper-access-control-in-querydsl)
- [VMware Spring Data REST information disclosure in exception serialization](https://junglewise.ai/threats/cve-2026-41730-vmware-spring-data-rest-information-disclosure-in-exception)
- [VMware Spring Data REST SpEL injection in JSON Patch processing](https://junglewise.ai/threats/cve-2026-41729-vmware-spring-data-rest-spel-injection-in-json-patch-processing)
- [VMware Spring Data REST improper access control in JSON Patch](https://junglewise.ai/threats/cve-2026-41728-vmware-spring-data-rest-improper-access-control-in-json-patch)