CVE-2026-75508
GraphQL-core is a Python port of the GraphQL.js reference implementation.
- Severity: High
- CVSS 7.5
- P3 · Planned
Why P3: planned.
Description
GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.2.3 until 3.2.12 and 3.3.0rc1, the parser's max_tokens limit in Parser.advance_lexer counts only non-comment tokens returned after Lexer.lookahead skips comments. Each skipped comment is still allocated as a Token and retained through token.next and token.prev, allowing a highly compressible comment-padded GraphQL document to pass a low token limit while consuming memory. An unauthenticated remote attacker can exhaust worker memory before AST-based depth or complexity controls run. This issue is fixed in versions 3.2.12 and 3.3.0rc1.
Affected products
- pip graphql-core >= 3.2.3, < 3.2.12; first patched: 3.2.12
- pip graphql-core >= 3.3.0a3, < 3.3.0rc1; first patched: 3.3.0rc1
Weakness
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- NVD record NVD
- CVE Program record CVE Program
- Reference NVD
- Reference NVD
- Reference NVD
- Reference NVD
- Reference NVD
- GitHub security advisory GitHub