# CVE-2026-57111: Apache Helix REST: Permissive CORS Configuration in REST API Allows Unrestricted Cross-Origin

> Permissive CORS settings in Apache Helix REST allow attackers to read data and modify state via cross-origin requests from malicious websites.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jul 2026
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-2h97-jww5-mwvc

## What is CVE-2026-57111?

CVE-2026-57111 is a high-severity vulnerability in Apache Helix REST, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Permissive Cross-Origin Resource Sharing (CORS) in the REST API (helix-rest, org.apache.helix.rest.server.filters.CORSFilter) in Apache Helix through 2.0.0 on all platforms allows a remote attacker controlling a web page visited by an authorized user to read responses from and issue cross-origin requests to administrative REST endpoints via a cross-origin request from an arbitrary origin, since the filter unconditionally returns Access-Control-Allow-Origin: * together with Access-Control-Allow-Credentials: true and reflects arbitrary Access-Control-Request-Method / Access-Control-Request-Headers values in preflight responses. Users are recommended to upgrade to version 2.0.1, which fixes this issue.

Weakness: CWE-1385 (Missing Origin Validation in WebSockets)

## Which versions are affected by CVE-2026-57111?

It affects 1 product.


Products: Apache Helix.

## How do I fix CVE-2026-57111?

No fix has been published for CVE-2026-57111 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-57111 being exploited?

There is no known exploitation of CVE-2026-57111 in the wild and no public exploit code.

## Other vulnerabilities in Apache Helix REST

- [CVE-2023-38647](https://insights.sbomify.com/CVE-2023-38647/): Apache Helix: Deserialization vulnerability in Helix workflow and REST (critical 9.8)
- [CVE-2024-22281](https://insights.sbomify.com/CVE-2024-22281/): Apache Helix Front (UI): Helix front hard-coded secret in the express-session (high 7.5)
- [CVE-2022-47500](https://insights.sbomify.com/CVE-2022-47500/): Apache Helix: Open redirect (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-57111 and fix it if it is affected.

What it is: CVE-2026-57111 is a high-severity vulnerability in Apache Helix REST, published on 9 Jul 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-2026-57111 in the wild and no public exploit code.

Affected product: Apache Helix 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-2026-57111/ (Markdown: https://insights.sbomify.com/CVE-2026-57111/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-57111
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-57111
- OSV: https://osv.dev/vulnerability/CVE-2026-57111

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-57111/
Summaries are generated and may contain mistakes; the official description above is the record.