{"id":"CVE-2026-33326","aliases":["GHSA-cgcg-q9jh-5pr2"],"url":"https://o3.security/vulnerability/CVE-2026-33326","summary":"@keystone-6/core: `isFilterable` bypass via `cursor` parameter in findMany","details":"# Summary  \n`{field}.isFilterable` access control can be bypassed in `findMany` queries by passing a `cursor`.  This can be used to confirm the existence of records by protected field values.\n\nThe fix for [CVE-2025-46720](https://github.com/keystonejs/keystone/security/advisories/GHSA-hg9m-67mm-7pg3) (field-level `isFilterable` bypass for update and delete mutations) added checks to the `where` parameter in `update` and `delete` mutations however the `cursor` parameter in `findMany` was not patched and accepts the same `UniqueWhere` input type.\n\n# Impact  \nThis affects any project relying on `isFilterable` behaviour (at the list or field level) to prevent external users from using the filtering of fields as a discovery mechanism. `isFilterable` access control using a function can be bypassed by using the `cursor` input.\n\nThis has no impact on projects using `isFilterable: false` or `defaultIsFilterable: false` for sensitive fields, or if you have otherwise omitted filtering by these fields from your GraphQL schema. (See workarounds)\n\n# Patches  \nThis issue has been patched in `@keystone-6/core` version 6.5.2.\n\n# Workarounds  \nTo mitigate this issue in older versions where patching is not a viable pathway.\n\n- Set `{field}.isFilterable: false` statically for relevant fields to prevent filtering by them earlier in the access control pipeline (that is, don't use functions)\n- Set `{field}.graphql.omit.read: true` for relevant fields, which implicitly removes filtering by these fields your GraphQL schema","published":"2026-03-24T19:08:05.877Z","modified":"2026-08-12T03:51:19.792362246Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.00257,"percentile":0.17045,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@keystone-6/core","fixedVersion":"6.5.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33326.json"},{"type":"ADVISORY","url":"https://github.com/keystonejs/keystone/security/advisories/GHSA-cgcg-q9jh-5pr2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33326"},{"type":"PACKAGE","url":"https://github.com/keystonejs/keystone"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:19.792362246Z"}}