CVE-2026-63759 SurrealDB before 3.1.0 Denial of Service nested type annotations
Authenticated attackers can crash the SurrealDB server by sending queries with deeply nested type annotations, causing memory exhaustion.
- 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-2026-63759?
CVE-2026-63759 is a high-severity denial of service vulnerability in Surrealdb Surrealdb, published on 20 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
SurrealDB before 3.1.0 fails to enforce recursion depth limits in the type/kind parser when processing nested type annotations. Authenticated attackers can send queries with deeply nested type annotations to exhaust server memory and crash the process.
Weakness: CWE-674
Which versions are affected by CVE-2026-63759?
It affects 1 product.
Products include Surrealdb Surrealdb.
How do I fix CVE-2026-63759?
No fix has been published for CVE-2026-63759 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-2026-63759 being exploited?
There is no known exploitation of CVE-2026-63759 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-2026-63747 SurrealDB before 3.1.0 Denial of Service via malformed RPC use
- 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
Sources
Also known as GHSA-56pq-53x9-mxc4.