{"cve":"CVE-2026-75508","nvd":{"published":"2026-10-22T17:16:59.933","modified":"2026-10-22T17:40:46.877","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400","CWE-770"],"references":["https://github.com/graphql-python/graphql-core/commit/437dea102e92fdf05a2971ca76787c5a5bad875a","https://github.com/graphql-python/graphql-core/commit/80ef435a1808fbbcc4aaac63ae76771a1c91002d","https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12","https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1","https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:28.036610720+00:00"},"epss":{"cve":"CVE-2026-75508","score":0.00573,"percentile":0.47059,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-r77w-qph3-7vf8","url":"https://osv.dev/vulnerability/GHSA-r77w-qph3-7vf8","summary":"GraphQL-core: Denial of service via comment tokens bypassing the parser's max_tokens limit","modified":"2026-10-22T16:45:04.297396287Z","packages":[{"ecosystem":"PyPI","name":"graphql-core","purl":"pkg:pypi/graphql-core","ranges":[">=3.2.3 <3.2.12"],"fixed":["3.2.12"]},{"ecosystem":"PyPI","name":"graphql-core","purl":"pkg:pypi/graphql-core","ranges":[">=3.3.0a3 <3.3.0rc1"],"fixed":["3.3.0rc1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}