{"id":"UBUNTU-CVE-2026-75508","details":"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.","modified":"2026-10-27T04:17:56.870089416Z","published":"2026-10-26T00:00:00Z","upstream":["CVE-2026-75508"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-75508"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-75508"},{"type":"REPORT","url":"https://github.com/graphql-python/graphql-core/commit/437dea102e92fdf05a2971ca76787c5a5bad875a"},{"type":"REPORT","url":"https://github.com/graphql-python/graphql-core/commit/80ef435a1808fbbcc4aaac63ae76771a1c91002d"},{"type":"REPORT","url":"https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12"},{"type":"REPORT","url":"https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1"},{"type":"REPORT","url":"https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8"}],"affected":[{"package":{"name":"graphql-core","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/graphql-core?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.2-1","binary_name":"python3-graphql-core"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json"}},{"package":{"name":"graphql-core","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/graphql-core?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.3-2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.2.3-2","binary_name":"python3-graphql-core"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json"}},{"package":{"name":"graphql-core","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/graphql-core?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.7-1","3.2.8-1","3.2.11-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-graphql-core","binary_version":"3.2.11-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json"}},{"package":{"name":"graphql-core","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/graphql-core?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.6-1","3.2.6-2","3.2.7-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.2.7-1","binary_name":"python3-graphql-core"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}