## GraphQL-core: Denial of service via comment tokens bypassing the parser's max_tokens limit

- 種別: advisory
- 重大度: high
- 関連技術: python
- CVE: CVE-2026-75508
- 公開日時: 2026-10-22T16:27:14.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-r77w-qph3-7vf8)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-r77w-qph3-7vf8

影響: pip:graphql-core >= 3.2.3, < 3.2.12 → 3.2.12, pip:graphql-core >= 3.3.0a3, < 3.3.0rc1 → 3.3.0rc1
The parser's max_tokens limit — the documented defence against oversized GraphQL documents — did not count comment tokens. A document padded with comments could therefore pass a max_tokens check of any size while still allocating one Token object per comment, all of which stay reachable for the lifetime of the parsed document. A 38 MB comment-padded payload allocated roughly 92 MB of additional resident memory with max_tokens=5 in force. Details Lexer.lookahead() reads tokens one at a time and…