{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55866","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-17T16:44:40.996Z","datePublished":"2026-09-14T17:23:56.428Z","dateUpdated":"2026-09-14T18:15:41.075Z"},"containers":{"cna":{"title":"SpiceDBChecks involving relations with caveats can result in unconditional permission when conditional permission is expected","problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv"},{"name":"https://github.com/authzed/spicedb/pull/3188","tags":["x_refsource_MISC"],"url":"https://github.com/authzed/spicedb/pull/3188"},{"name":"https://github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b","tags":["x_refsource_MISC"],"url":"https://github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b"},{"name":"https://github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30","tags":["x_refsource_MISC"],"url":"https://github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30"},{"name":"https://github.com/authzed/spicedb/releases/tag/v1.54.0","tags":["x_refsource_MISC"],"url":"https://github.com/authzed/spicedb/releases/tag/v1.54.0"}],"affected":[{"vendor":"authzed","product":"spicedb","versions":[{"version":">= 1.34.1, < 1.54.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-14T17:23:56.428Z"},"descriptions":[{"lang":"en","value":"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 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."}],"source":{"advisory":"GHSA-4vrg-r928-h5vv","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-14T18:15:32.043031Z","id":"CVE-2026-55866","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-14T18:15:41.075Z"}}]}}