{"id":"GHSA-grjv-gjgr-66g2","summary":"SpiceDB exclusions can result in no permission returned when permission expected","details":"### Background\n\nUse of an exclusion under an arrow that has multiple resources may resolve to `NO_PERMISSION` when permission is expected.\n\nFor example, given this schema:\n\n```zed\ndefinition user {}\n\ndefinition folder {\n  relation member: user\n  relation banned: user\n  permission view = member - banned\n}\n\ndefinition resource {\n  relation folder: folder\n  permission view = folder-\u003eview\n}\n```\n\nIf the resource exists under *multiple* folders and the user has access to view more than a single folder, SpiceDB may report the user does not have access due to a failure in the exclusion dispatcher to request that *all* the folders in which the user is a member be returned\n\n### Impact\n\nPermission is returned as `NO_PERMISSION` when `PERMISSION` is expected on the `CheckPermission` API.\n\n### Workarounds\n\nNone\n","aliases":["CVE-2024-38361","GO-2024-2939"],"modified":"2026-07-17T21:07:53.170054086Z","published":"2024-06-20T16:24:01Z","database_specific":{"cwe_ids":["CWE-281"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2024-06-20T16:24:01Z","nvd_published_at":"2024-06-20T23:15:52Z"},"references":[{"type":"WEB","url":"https://github.com/authzed/spicedb/security/advisories/GHSA-grjv-gjgr-66g2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-38361"},{"type":"WEB","url":"https://github.com/authzed/spicedb/commit/ecef31d2b266fde17eb2c3415e2ec4ceff96fbeb"},{"type":"PACKAGE","url":"https://github.com/authzed/spicedb"}],"affected":[{"package":{"name":"github.com/authzed/spicedb","ecosystem":"Go","purl":"pkg:golang/github.com/authzed/spicedb"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.33.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/06/GHSA-grjv-gjgr-66g2/GHSA-grjv-gjgr-66g2.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}