{"id":"CVE-2026-75508","published":"2026-10-22T17:16:59.933","lastModified":"2026-10-22T17:40:46.877","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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-400","CWE-770"],"vendors":[],"products":[],"references":[{"url":"https://github.com/graphql-python/graphql-core/commit/437dea102e92fdf05a2971ca76787c5a5bad875a","tags":[]},{"url":"https://github.com/graphql-python/graphql-core/commit/80ef435a1808fbbcc4aaac63ae76771a1c91002d","tags":[]},{"url":"https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12","tags":[]},{"url":"https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1","tags":[]},{"url":"https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8","tags":[]}],"exploitRefs":[{"url":"https://github.com/graphql-python/graphql-core/commit/437dea102e92fdf05a2971ca76787c5a5bad875a","tags":[]},{"url":"https://github.com/graphql-python/graphql-core/commit/80ef435a1808fbbcc4aaac63ae76771a1c91002d","tags":[]},{"url":"https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12","tags":[]},{"url":"https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1","tags":[]},{"url":"https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8","tags":[]}],"hasPoc":true,"ai":null}