{"api_version":"1","generated_at":"2026-09-20T17:39:12+00:00","cve":"CVE-2026-55866","urls":{"html":"https://cve.report/CVE-2026-55866","api":"https://cve.report/api/cve/CVE-2026-55866.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-55866","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55866"},"summary":{"title":"SpiceDBChecks involving relations with caveats can result in unconditional permission when conditional permission is expected","description":"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-09-14 18:17:56","updated_at":"2026-09-14 19:17:33"},"problem_types":["CWE-863","CWE-863 CWE-863: Incorrect Authorization"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"3.7","severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":3.7,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"3.7","severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","data":{"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":[{"url":"https://github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv","name":"https://github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/authzed/spicedb/releases/tag/v1.54.0","name":"https://github.com/authzed/spicedb/releases/tag/v1.54.0","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b","name":"https://github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/authzed/spicedb/pull/3188","name":"https://github.com/authzed/spicedb/pull/3188","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30","name":"https://github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55866","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55866","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"authzed","product":"spicedb","version":"affected >= 1.34.1, < 1.54.0","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-55866","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-09-14T18:15:32.043031Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-09-14T18:15:41.075Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"spicedb","vendor":"authzed","versions":[{"status":"affected","version":">= 1.34.1, < 1.54.0"}]}],"descriptions":[{"lang":"en","value":"SpiceDB is an open source database system for creating and managing security-critical application permissions. 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This issue is fixed in version 1.54.0."}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-14T17:23:56.428Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"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"}],"source":{"advisory":"GHSA-4vrg-r928-h5vv","discovery":"UNKNOWN"},"title":"SpiceDBChecks involving relations with caveats can result in unconditional permission when conditional permission is expected"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-55866","datePublished":"2026-09-14T17:23:56.428Z","dateReserved":"2026-06-17T16:44:40.996Z","dateUpdated":"2026-09-14T18:15:41.075Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-14 18:17:56","lastModifiedDate":"2026-09-14 19:17:33","problem_types":["CWE-863","CWE-863 CWE-863: Incorrect Authorization"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":3.7,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-14T18:15:32.043031Z","id":"CVE-2026-55866","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"55866","Ordinal":"1","Title":"SpiceDBChecks involving relations with caveats can result in unc","CVE":"CVE-2026-55866","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"55866","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"SpiceDBChecks involving relations with caveats can result in unc"}]}}}