CVE-2026-109334 SurrealDB before 3.3.0 Cross-Tenant Access via Surreal-NS/Surreal-DB Headers and RPC use
An authenticated attacker can access other tenants' data by manipulating namespace and database headers or RPC calls in SurrealDB.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109334?
CVE-2026-109334 is a high-severity missing authorization vulnerability in surrealdb, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
SurrealDB before 3.3.0 does not check the caller-selected namespace or database against the level at which a namespace- or database-level system user authenticated, allowing cross-tenant access. An authenticated attacker can set the Surreal-NS/Surreal-DB headers on /sql or call the RPC use method to read, create, modify, and delete rows and read DEFINE PARAM values in another tenant where table PERMISSIONS allow it.
Weakness: CWE-639
Which versions are affected by CVE-2026-109334?
How do I fix CVE-2026-109334?
No fix has been published for CVE-2026-109334 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-109334 being exploited?
There is no known exploitation of CVE-2026-109334 in the wild and no public exploit code.
Sources
Also known as GHSA-jhvg-6gg5-qpmp.