CVE-2026-75508

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 maxtokens limit in Parser.advancelexer counts only non-comment tokens returned after Lexer.lookahead skips comments. Each skipped comment is still allocated as a Token and...

GHSA-R77W-QPH3-7VF8 GraphQL-core: Denial of service via comment tokens bypassing the parser's max_tokens limit

Summary The parser's maxtokens limit — the documented defence against oversized GraphQL documents — did not count comment tokens. A document padded with comments could therefore pass a maxtokens check of any size while still allocating one Token object per comment, all of which stay reachable for...

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

Summary The parser's maxtokens limit — the documented defence against oversized GraphQL documents — did not count comment tokens. A document padded with comments could therefore pass a maxtokens check of any size while still allocating one Token object per comment, all of which stay reachable for...