CVE-2026-55866

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{"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": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-55866", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-14T18:15:32.043031Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-14T18:15:36.347Z"}}]}}

{"affected": [{"affectedData": [{"product": "spicedb", "vendor": "authzed", "versions": [{"status": "affected", "version": ">= 1.34.1, < 1.54.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-55866", "lastModified": "2026-09-30T19:38:27.293", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55866", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-14T18:15:32.043031Z", "version": "2.0.3"}}]}, "published": "2026-09-14T18:17:56.150", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b"}, {"source": "security-advisories@github.com", "url": "https://github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30"}, {"source": "security-advisories@github.com", "url": "https://github.com/authzed/spicedb/pull/3188"}, {"source": "security-advisories@github.com", "url": "https://github.com/authzed/spicedb/releases/tag/v1.54.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.34.1,1.54.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "spicedb", "source": "cna", "vendor": "authzed"}, "product": "spicedb", "vendor": "authzed"}], "created": "2026-09-15T06:00:21.710683+00:00", "updated": "2026-09-20T23:15:04.744675+00:00", "vendors": ["authzed", "authzed$PRODUCT$spicedb"]}