{"id":"DEBIAN-CVE-2026-75507","details":"GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.0.0 until 3.2.12 and 3.3.0rc1, the OverlappingFieldsCanBeMerged rule in specified_rules repeatedly compares fields that share response names and recursively re-compares flattened inline fragments during the validation phase. The prior named-fragment memoization does not cover this path, so nested repeated inline fragments can drive quadratic and worst-case O(n²·m²) CPU work before any resolver or AST-based depth or complexity control runs. An unauthenticated remote attacker can submit a shallow, highly compressible GraphQL query that pins a worker process and can saturate a multi-worker service. This issue is fixed in versions 3.2.12 and 3.3.0rc1.","modified":"2026-10-23T18:04:42.311298150Z","published":"2026-10-22T17:16:59.757Z","upstream":["CVE-2026-75507"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-75507"}],"affected":[{"package":{"name":"graphql-core","ecosystem":"Debian:12","purl":"pkg:deb/debian/graphql-core?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2-1","3.1.7-1","3.2.0-1","3.2.1-1","3.2.11-1","3.2.12-1","3.2.3-1","3.2.3-2","3.2.4-1","3.2.5-1","3.2.6-1","3.2.6-2","3.2.7-1","3.2.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75507.json"}},{"package":{"name":"graphql-core","ecosystem":"Debian:13","purl":"pkg:deb/debian/graphql-core?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.11-1","3.2.12-1","3.2.6-1","3.2.6-2","3.2.7-1","3.2.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75507.json"}},{"package":{"name":"graphql-core","ecosystem":"Debian:14","purl":"pkg:deb/debian/graphql-core?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.12-1"}]}],"versions":["3.2.11-1","3.2.6-1","3.2.6-2","3.2.7-1","3.2.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-75507.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}