---
title: "CVE-2026-75508: GraphQL-core - Denial of Service"
description: "GraphQL-core 3.2.3 to 3.2.12 and 3.3.0rc1 contain a denial of service caused by improper max_tokens counting in parser allowing memory exhaustion via comment-padded documents, letting unauthenticated remote attackers exhaust memory, exploit requires crafted GraphQL queries with many comments."
url: https://panop.io/threat-heartbeat/CVE-2026-75508/
---

# CVE-2026-75508 GraphQL-core - Denial of Service

GraphQL-core 3.2.3 to 3.2.12 and 3.3.0rc1 contain a denial of service caused by improper max\_tokens counting in parser allowing memory exhaustion via comment-padded documents, letting unauthenticated remote attackers exhaust memory, exploit requires crafted GraphQL queries with many comments.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-75508)

## 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

22 October 2026

Updated

23 October 2026

Weakness

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

## Vendor fix

Update to version 3.2.12 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-2026-75508](https://nvd.nist.gov/vuln/detail/CVE-2026-75508)
- [https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1](https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1)
- [https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8](https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8)
- [https://github.com/graphql-python/graphql-core/commit/437dea102e92fdf05a2971ca76787c5a5bad875a](https://github.com/graphql-python/graphql-core/commit/437dea102e92fdf05a2971ca76787c5a5bad875a)
- [https://github.com/graphql-python/graphql-core/commit/80ef435a1808fbbcc4aaac63ae76771a1c91002d](https://github.com/graphql-python/graphql-core/commit/80ef435a1808fbbcc4aaac63ae76771a1c91002d)
- [https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12](https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12)

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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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