SurrealDB up to 2.0.4/2.1.4/2.2.1 Function Execution DEFINE FUNCTION denial of service

Summaryinfo

A vulnerability was found in SurrealDB up to 2.0.4/2.1.4/2.2.1 and classified as problematic. This issue affects the function DEFINE FUNCTION of the component Function Execution. The manipulation results in denial of service. This vulnerability is identified as CVE-2025-71397. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in SurrealDB up to 2.0.4/2.1.4/2.2.1. It has been classified as problematic. Affected is the function DEFINE FUNCTION of the component Function Execution. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

SurrealDB before 2.0.5, 2.1.x before 2.1.5, and 2.2.x before 2.2.2 allows authenticated users with OWNER or EDITOR permissions (at the root, namespace, or database level) to define custom database functions via DEFINE FUNCTION using nested FOR loops. Although a single loop's iteration count is constrained, nesting multiple loops (e.g., each with 1,000,000 iterations) is not, so an attacker can execute a function that consumes all server CPU time. Configured timeouts do not stop the execution, rendering the server unresponsive to other queries and connections until it is manually restarted.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-71397 since 07/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 2.0.5, 2.1.5 or 2.2.2 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• SurrealDB

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.2.0
• 2.2.1

Website

• Product: https://github.com/surrealdb/surrealdb/

CPE 2.3info

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CPE 2.2info

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