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

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…

GitHub Advisory Databaseで読む

2026/10/23 01:27、GitHub Advisory Databaseが「GraphQL-core: Denial of service via comment tokens bypassing the parser's max_tokens limit」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「重要」(high) です。関連する技術: Python。CVE: CVE-2026-75508。