# CVE-2026-3118: Rhdh: graphql injection leading to platform-wide denial of service (dos) in rh developer hub orchestrator plugin

> An authenticated user can inject GraphQL queries to crash the Red Hat Developer Hub, causing a platform-wide denial of service.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Feb 2026
- **Updated:** 5 May 2026
- **Also known as:** GHSA-qvwr-8759-6g2c

## What is CVE-2026-3118?

CVE-2026-3118 is a medium-severity vulnerability in Red Hat Developer Hub 1.8, published on 25 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security flaw was identified in the Orchestrator Plugin of Red Hat Developer Hub (Backstage). The issue occurs due to insufficient input validation in GraphQL query handling. An authenticated user can inject specially crafted input into API requests, which disrupts backend query processing. This results in the entire Backstage application crashing and restarting, leading to a platform-wide Denial of Service (DoS). As a result, legitimate users temporarily lose access to the platform.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2026-3118?

It affects 1 product.


Products: Redhat Developer Hub.

## How do I fix CVE-2026-3118?

No fix has been published for CVE-2026-3118 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3118 being exploited?

There is no known exploitation of CVE-2026-3118 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3118 and fix it if it is affected.

What it is: CVE-2026-3118 is a medium-severity vulnerability in Red Hat Developer Hub 1.8, published on 25 Feb 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-2026-3118 in the wild and no public exploit code.

Affected product: Red Hat Developer Hub 1.8. 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-2026-3118/ (Markdown: https://insights.sbomify.com/CVE-2026-3118/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3118
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3118
- OSV: https://osv.dev/vulnerability/CVE-2026-3118

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3118/
Summaries are generated and may contain mistakes; the official description above is the record.