{"id":"CVE-2026-55866","title":"SpiceDB is an open source database system for creating and managing security-critical application permissions","summary":"SpiceDB is an open source database system for creating and managing security-critical application permissions. From 1.34.0 until 1.54.0, SpiceDB can return PERMISSIONSHIP_HAS_PERMISSION instead of PERMISSIONSHIP_CONDITIONAL_PERMISSION or…","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-863"],"vendor":"authzed","product":"spicedb","affected":["spicedb >= 1.34.1, < 1.54.0"],"patched":["github.com/authzed/spicedb 1.54.0"],"published":"2026-09-14","updated":"2026-09-14","sourceUpdated":"2026-09-14T19:17:33.193","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55866","references":[{"url":"https://github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b","label":"security-advisories@github.com"},{"url":"https://github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30","label":"security-advisories@github.com"},{"url":"https://github.com/authzed/spicedb/pull/3188","label":"security-advisories@github.com"},{"url":"https://github.com/authzed/spicedb/releases/tag/v1.54.0","label":"security-advisories@github.com"},{"url":"https://github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-4vrg-r928-h5vv"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55866.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-55866"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55866"}],"tags":["nvd","cve.org","ghsa","go","csaf","vex","red-hat"],"ecosystem":"go","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-14T18:15:32.043031Z"},"ingestedAt":"2026-06-22T13:35:24.278Z","epss":0.00219,"epssPercentile":0.12659,"slug":"CVE-2026-55866","body":"## Overview\n\nSpiceDB is an open source database system for creating and managing security-critical application permissions. From 1.34.0 until 1.54.0, SpiceDB can return PERMISSIONSHIP_HAS_PERMISSION instead of PERMISSIONSHIP_CONDITIONAL_PERMISSION or PERMISSIONSHIP_NO_PERMISSION because checkRequestToKey() and checkRequestToKeyWithCanonical() in internal/dispatch/keys/computed.go omit CheckHints when constructing dispatch Check cache keys. The incorrect result requires a permission combining relations with intersection or exclusion, a subject reachable through caveated and non-caveated branches, LookupResources with a context parameter running concurrently with CheckPermission or CheckBulkPermissions for the same resource and subject, and an enabled dispatch result cache. Under these conditions, a result computed for one hint set can poison the cache entry used by a semantically different authorization check, allowing permission without satisfying the caveat. This issue is fixed in version 1.54.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-55866)\n\nAffected packages:\n\n- `github.com/authzed/spicedb >= 1.34.0, < 1.54.0`\n\nPatched in:\n\n- `github.com/authzed/spicedb 1.54.0`\n\nSource: https://github.com/advisories/GHSA-4vrg-r928-h5vv\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55866.json)","depth":"sunlit","depthScore":20,"depthScoreParts":{"impact":20.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}