Vulnerability Description
Weaviate before 1.38.0 does not verify that a principal performing an RBAC role assignment holds the permissions granted by the assigned role. The assignRoleToUser and assignRoleToGroup handlers (POST /authz/users/{id}/assign and /authz/groups/{id}/assign) authorize only that the caller may assign roles to the target user or group, not the permissions contained in the assigned roles, unlike role creation which enforces that a user can only create roles with permissions less than or equal to its own. A user holding only the delegated assign_and_revoke_users or assign_and_revoke_groups permission can assign the built-in admin role, or any high-privilege custom role, to itself or others, escalating to full administrative control of the database.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Weaviate | Weaviate | < 1.38.0 |
Related Weaknesses (CWE)
References
- https://github.com/weaviate/weaviate/commit/2c75f6fb217631f7751c4b2a7d37a488cef1Patch
- https://github.com/weaviate/weaviate/pull/11493Issue TrackingPatch
- https://github.com/weaviate/weaviate/releases/tag/v1.38.0ProductRelease Notes
- https://www.vulncheck.com/advisories/weaviate-privilege-escalation-via-uncheckedPatchRelease NotesThird Party Advisory
FAQ
What is CVE-2026-59093?
CVE-2026-59093 is a vulnerability with a CVSS score of 8.8 (HIGH). Weaviate before 1.38.0 does not verify that a principal performing an RBAC role assignment holds the permissions granted by the assigned role. The assignRoleToUser and assignRoleToGroup handlers (POST...
How severe is CVE-2026-59093?
CVE-2026-59093 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59093?
Check the references section above for vendor advisories and patch information. Affected products include: Weaviate Weaviate.