CVE-2026-55866
SpiceDBChecks involving relations with caveats can result in unconditional permission when conditional permission is expected
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Low3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Awaiting Analysis | 3.1 | Low3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.34% · top 72% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/authzed/spicedbGHSA-4vrg-r928-h5vv (opens in a new tab)
References (5)
- https://github.com/authzed/spicedb/security/advisories/GHSA-4vrg-r928-h5vv (opens in a new tab)x_refsource_CONFIRM
- https://github.com/authzed/spicedb/pull/3188 (opens in a new tab)x_refsource_MISC
- https://github.com/authzed/spicedb/commit/44a1c9f266bd8a884bfebfc27181210302541b9b (opens in a new tab)x_refsource_MISC
- https://github.com/authzed/spicedb/commit/ccde792fc48750740d025d4286d5c2c88614cd30 (opens in a new tab)x_refsource_MISC
- https://github.com/authzed/spicedb/releases/tag/v1.54.0 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-4vrg-r928-h5vv (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-55866)Record last updated .