{
    "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"
                }
            }
        ]
    }
}