SpiceDBChecks involving relations with caveats can result in unconditional permission when conditional permission is expected

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55866
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-14 18:17:56 UTC
Updated2026-09-14 19:17:33 UTC
DescriptionSpiceDB 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.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-863 | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Authzed Spicedb affected >= 1.34.1, < 1.54.0 Not specified

References

ReferenceSourceLinkTags
github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv [email protected] github.com
github.com/authzed/spicedb/releases/tag/v1.54.0 [email protected] github.com
github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b [email protected] github.com
github.com/authzed/spicedb/pull/3188 [email protected] github.com
github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30 [email protected] github.com
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