CVE-2026-63747 SurrealDB before 3.1.0 Denial of Service via malformed RPC use
Unauthenticated attackers can crash the SurrealDB server by sending malformed WebSocket messages to the RPC endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63747?
CVE-2026-63747 is a high-severity denial of service vulnerability in Surrealdb Surrealdb, published on 20 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SurrealDB versions before 3.1.0 contain a denial of service vulnerability in the RPC use handler that panics when db is set without a namespace. Unauthenticated attackers can send a malformed WebSocket message to the /rpc endpoint to crash the server process.
Weakness: CWE-248
Which versions are affected by CVE-2026-63747?
It affects 1 product.
Products include Surrealdb Surrealdb.
How do I fix CVE-2026-63747?
No fix has been published for CVE-2026-63747 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-63747 being exploited?
There is no known exploitation of CVE-2026-63747 in the wild and no public exploit code.
Other vulnerabilities in Surrealdb Surrealdb
- CVE-2025-71392 SurrealDB before 2.2.2 SurrealQL Injection via export
- CVE-2026-63756 SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition
- CVE-2026-63757 SurrealDB before 3.1.0 Session Hijacking via /rpc sessions
- CVE-2026-63760 SurrealDB before 3.1.0 Denial of Service via JSON Parser
- CVE-2023-54366 SurrealDB before 1.0.1 Insecure Default Table Permissions
Sources
Also known as GHSA-j7ww-7h79-mmf6.