# CVE-2026-47875: JobParameterDeserializer bypasses the trusted-type allowlist

> Attackers can achieve arbitrary code execution by exploiting a deserialization flaw in Spring Batch when using untrusted job repository data.

- **Severity:** Medium 5.6 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Aug 2026
- **Updated:** 28 Aug 2026
- **Also known as:** GHSA-mvcx-qg6f-j67g

## What is CVE-2026-47875?

CVE-2026-47875 is a medium-severity unsafe deserialization vulnerability in Spring Batch, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Applications that deserialize execution contexts with Jackson2ExecutionContextStringSerializer are vulnerable to a deserialization attack if they use an untrusted data source for the job repository. The JobParameterDeserializer does not properly enforce the trusted-types allowlist, allowing an attacker to craft malicious input that can lead to arbitrary code execution, including known Jackson RCE gadgets.
Spring Batch 6.0.0 - 6.0.4
Spring Batch 5.2.0 - 5.2.6

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-47875?

It affects 1 product.


Products: Broadcom Spring Batch.

## How do I fix CVE-2026-47875?

Upgrade to a fixed version.

## Is CVE-2026-47875 being exploited?

There is no known exploitation of CVE-2026-47875 in the wild and no public exploit code.

## Other vulnerabilities in Spring Batch

- [CVE-2019-3774](https://insights.sbomify.com/CVE-2019-3774/): Spring Batch XML External Entity Injection (XXE) (critical 9.8)
- [CVE-2020-5411](https://insights.sbomify.com/CVE-2020-5411/): Jackson Configuration Allows Code Execution with Unknown "Serialization Gadgets" (high 8.1)
- [CVE-2026-47881](https://insights.sbomify.com/CVE-2026-47881/): Denial of Service in Spring Batch FlatFileItemReader via Malformed Input File (medium 5.9)
- [CVE-2026-47878](https://insights.sbomify.com/CVE-2026-47878/): Unsafe Java deserialization in DefaultExecutionContextSerializer without class allowlist (medium 5.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-47875 and fix it if it is affected.

What it is: CVE-2026-47875 is a medium-severity unsafe deserialization vulnerability in Spring Batch, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-47875 in the wild and no public exploit code.

Affected product: Spring Batch. 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-2026-47875/ (Markdown: https://insights.sbomify.com/CVE-2026-47875/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-47875
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-47875
- OSV: https://osv.dev/vulnerability/CVE-2026-47875

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-47875/
Summaries are generated and may contain mistakes; the official description above is the record.