---
title: "CVE-2026-119286: GraphQL-core - Denial of Service"
description: "GraphQL-core 3.3.0a3 to 3.3.1 contains a denial of service caused by reuse of ValidationAbortedError retaining tracebacks, letting unauthenticated clients exhaust memory by submitting documents with many validation errors, exploit requires no authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-119286/
---

# CVE-2026-119286 GraphQL-core - Denial of Service

GraphQL-core 3.3.0a3 to 3.3.1 contains a denial of service caused by reuse of ValidationAbortedError retaining tracebacks, letting unauthenticated clients exhaust memory by submitting documents with many validation errors, exploit requires no authentication.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.42% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-119286)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

29 October 2026

Updated

31 October 2026

Weakness

[CWE-400](https://cwe.mitre.org/data/definitions/400.html)

## Vendor fix

Update to version 3.3.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-119286](https://nvd.nist.gov/vuln/detail/CVE-2026-119286)
- [https://github.com/graphql-python/graphql-core/commit/3c319fd9f4b8f6c9db4189520561bf8dd0e70be9](https://github.com/graphql-python/graphql-core/commit/3c319fd9f4b8f6c9db4189520561bf8dd0e70be9)
- [https://github.com/graphql-python/graphql-core/issues/287](https://github.com/graphql-python/graphql-core/issues/287)
- [https://github.com/graphql-python/graphql-core/pull/288](https://github.com/graphql-python/graphql-core/pull/288)
- [https://github.com/graphql-python/graphql-core/releases/tag/v3.3.1](https://github.com/graphql-python/graphql-core/releases/tag/v3.3.1)
- [https://github.com/graphql-python/graphql-core/security/advisories/GHSA-mpqx-q82w-9x46](https://github.com/graphql-python/graphql-core/security/advisories/GHSA-mpqx-q82w-9x46)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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