# CVE-2026-10802: keystonejs keystone GraphQL API Endpoint output-field.ts resource consumption

> Remote attackers can cause resource exhaustion in KeystoneJS GraphQL API endpoints, leading to denial of service.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **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:** 4 Jun 2026
- **Updated:** 4 Jun 2026
- **Also known as:** GHSA-45jq-c8xm-jfw9

## What is CVE-2026-10802?

CVE-2026-10802 is a medium-severity denial of service vulnerability in keystonejs keystone, published on 4 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was detected in keystonejs keystone up to 20260319. This vulnerability affects unknown code in the library packages/core/src/lib/core/queries/output-field.ts of the component GraphQL API Endpoint. The manipulation results in resource consumption. It is possible to launch the attack remotely. The exploit is now public and may be used. The pull request to fix this issue awaits acceptance.

Weakness: CWE-404 (Improper Resource Shutdown or Release), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2026-10802?

2 open source packages ship an affected version, including @keystone-6/core.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@keystone-6/core` | npm | All versions to 6.5.3 | None |
| `@keystone-6/core` | npm | All versions to 6.5.3 | None |

## How do I fix CVE-2026-10802?

No fix has been published for CVE-2026-10802 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-10802 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10802 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-10802 and fix it if it is affected.

What it is: CVE-2026-10802 is a medium-severity denial of service vulnerability in keystonejs keystone, published on 4 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10802 exists.

Affected packages and fixed versions:
- @keystone-6/core (npm): affected all versions up to 6.5.3; no fix listed
- @keystone-6/core (npm): affected all versions up to 6.5.3; no fix listed

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-2026-10802/ (Markdown: https://insights.sbomify.com/CVE-2026-10802/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-10802
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-10802
- OSV: https://osv.dev/vulnerability/CVE-2026-10802

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-10802/
Summaries are generated and may contain mistakes; the official description above is the record.