{"id":"CVE-2026-75508","revision":"adeb9024b3814030bc0e57df1a58df8e","records":[{"revision":"adeb9024b3814030bc0e57df1a58df8e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-75508","aliases":[],"title":"GraphQL-core: Denial of service via comment tokens bypassing the parser's max_tokens limit","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.","state":0,"publishedAt":"2026-10-22T16:10:17.124+00:00","modifiedAt":"2026-10-22T16:10:17.124+00:00","affected":[{"ecosystem":"Vendor product","name":"graphql-core","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"graphql-python\",\n                    \"product\": \"graphql-core\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 3.2.3, < 3.2.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.3.0a3, < 3.3.0rc1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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,"severity":"HIGH"}],"references":["https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8","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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-75508","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-75508","identifiers":["CVE-2026-75508"]},"retained":false,"historicalAffected":[]}],"coverage":[]}