CVE-2026-63734 SurrealDB before 3.2.0 Denial of Service via malformed SurrealML import

Medium 6.9 Published 20 Jul 2026 Updated 28 Jul 2026

Authenticated Owner-role users can crash the SurrealDB server by uploading a malformed SurrealML file, causing a denial of service.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-63734?

CVE-2026-63734 is a medium-severity denial of service vulnerability in Surrealdb Surrealdb, published on 20 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

SurrealDB versions before 3.2.0 contain a denial of service vulnerability in the SurrealML header parser that allows authenticated Owner-role users to crash the server by uploading a malformed .surml file to the /ml/import endpoint. Attackers can supply non-numeric input-dimensions or other malformed header fields that trigger unchecked unwrap calls, causing a panic that aborts the entire server process and denies service to all databases.

Weakness: CWE-20

Which versions are affected by CVE-2026-63734?

It affects 1 product.

Products include Surrealdb Surrealdb.

How do I fix CVE-2026-63734?

No fix has been published for CVE-2026-63734 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-2026-63734 being exploited?

There is no known exploitation of CVE-2026-63734 in the wild and no public exploit code.

All Surrealdb Surrealdb vulnerabilities

Sources

Also known as GHSA-vm8f-3v3v-fhw4.