CVE-2026-55866
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.
- CVSS 3.1
- 3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-25)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4vrg-r928-h5vv | Go | github.com/authzed/spicedb | >=1.34.0 <1.54.0 | 1.54.0 |
| GO-2026-5133 | Go | github.com/authzed/spicedb | >=1.34.0 <1.54.0 | 1.54.0 |
References
- https://github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b
- https://github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30
- https://github.com/authzed/spicedb/pull/3188
- https://github.com/authzed/spicedb/releases/tag/v1.54.0
- https://github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv