Vulnerability · Published Jul 18, 2026 · Assigned by VulnCheck

CVE-2025-71397SurrealDB before 2.2.2 CPU Exhaustion via nested FOR loops

High 7.1

In plain English

A high-severity infinite loop in surrealdb from surrealdb. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 46% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.6%top 53.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
surrealdb	surrealdb	2.2.0 – before 2.2.2
surrealdb	surrealdb	2.1.0 – before 2.1.5
surrealdb	surrealdb	0 – before 2.0.5

Weakness: CWE-835 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

GitHub Security Advisory (GHSA-pxw4-94j3-v9pf) vendor-advisory
VulnCheck Advisory: SurrealDB before 2.2.2 CPU Exhaustion via nested FOR loops third-party-advisory