CVE-2026-75508: CWE-400: Uncontrolled Resource Consumption in graphql-python graphql-core
Description
A vulnerability in graphql-core, a Python GraphQL implementation, allows unauthenticated remote attackers to cause uncontrolled resource consumption. The parser's max_tokens limit does not properly account for comment tokens, which are retained in memory despite being skipped, enabling memory exhaustion before other controls activate. This issue affects versions from 3.2.3 up to but not including 3.2.12, and from 3.3.0a3 up to but not including 3.3.0rc1. The vulnerability has a high severity with a CVSS score of 7.5 and is fixed in versions 3.2.12 and 3.3.0rc1.
CVSS v3.1
Score 7.5high
Affected software
graphql-python
graphql-core
pkg:pypi/graphql-coreRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
GraphQL-core versions 3.2.3 through 3.2.11 and 3.3.0a3 through 3.3.0rc1 contain a vulnerability (CVE-2026-75508) where the parser's max_tokens limit counts only non-comment tokens after skipping comments, but comment tokens are still allocated and linked in memory. This allows an attacker to craft a GraphQL document padded with many compressible comments that bypass the token limit while consuming excessive memory. This uncontrolled resource consumption can exhaust worker memory before AST-based depth or complexity controls are applied. The issue is resolved in versions 3.2.12 and 3.3.0rc1.
Potential Impact
An unauthenticated remote attacker can exploit this vulnerability to exhaust server memory resources, potentially leading to denial of service conditions. There is no impact on confidentiality or integrity, but availability is severely affected due to memory exhaustion.
Mitigation Recommendations
Upgrade graphql-core to version 3.2.12 or later, or to 3.3.0rc1 or later, where the issue is fixed. No other mitigations are specified or required once patched.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-17T20:49:21.598Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ada3a444d27ba8daa66741e
Added to database: 10/22/2026, 16:31:00 UTC
Last enriched: 10/22/2026, 16:45:17 UTC
Last updated: 10/22/2026, 16:46:07 UTC
Views: 5
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