# CVE-2026-47849: Spring Data REST allows mutation of identifier and version properties via JSON Patch

> Attackers can modify protected identifier and version fields in Spring Data REST entities using JSON Patch requests, compromising data integrity.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Aug 2026
- **Updated:** 27 Aug 2026
- **Also known as:** CLSA-2026-1788196746, CLSA-2026-1788279532, CLSA-2026-1788357718, CLSA-2026-1788359035, GHSA-4xj4-jmcc-9rq7

## What is CVE-2026-47849?

CVE-2026-47849 is a high-severity vulnerability in Spring Data REST, published on 27 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Spring Data REST does not guard identifier (@Id) and version (@Version) properties against mutation via RFC 6902 JSON Patch (application/json-patch+json) requests.
Spring Data REST 5.1.0
Spring Data REST 5.0.0 - 5.0.6
Spring Data REST 4.5.0 - 4.5.12
Spring Data REST 4.0.0 - 4.4.15
Spring Data REST 3.7.20 and earlier

Weakness: CWE-915 (Improperly Controlled Modification of Dynamically-Determined Object Attributes)

## Which versions are affected by CVE-2026-47849?

It affects 1 product.


Products: Vmware Spring Data Rest.

## How do I fix CVE-2026-47849?

Upgrade to a fixed version.

## Is CVE-2026-47849 being exploited?

There is no known exploitation of CVE-2026-47849 in the wild and no public exploit code.

## Other vulnerabilities in Spring Data REST

- [CVE-2026-41729](https://insights.sbomify.com/CVE-2026-41729/): Spring Data REST SpEL Injection via Map Key in JSON Patch (high 8.1)
- [CVE-2026-41728](https://insights.sbomify.com/CVE-2026-41728/): Spring Data REST JSON Patch bypasses Jackson read-only property protection on nested objects and collections (high 7.5)
- [CVE-2026-41730](https://insights.sbomify.com/CVE-2026-41730/): Spring Data REST exposes persistence-layer internals in error responses (medium 5.3)
- [CVE-2026-41837](https://insights.sbomify.com/CVE-2026-41837/): Spring Data REST Querydsl integration exposes Jackson-hidden persistent fields as filter keys (medium 5.3)
- [CVE-2021-22047](https://insights.sbomify.com/CVE-2021-22047/): Exposure of Resource to Wrong Sphere in Spring Data REST (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-47849 and fix it if it is affected.

What it is: CVE-2026-47849 is a high-severity vulnerability in Spring Data REST, published on 27 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-47849 in the wild and no public exploit code.

Affected product: Spring Data REST. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-47849/ (Markdown: https://insights.sbomify.com/CVE-2026-47849/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-47849
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-47849
- OSV: https://osv.dev/vulnerability/CVE-2026-47849

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-47849/
Summaries are generated and may contain mistakes; the official description above is the record.