Vulnerability · Published Jul 18, 2026 · Assigned by VulnCheck

CVE-2025-71395SurrealDB before 2.2.2 Memory Exhaustion via string::replace

High 7.1

In plain English

A high-severity security flaw 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 0.4% (higher than 39% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.4%top 60.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.

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-789 · 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-3633-g6mg-p6qq) vendor-advisory
VulnCheck Advisory: SurrealDB before 2.2.2 Memory Exhaustion via string::replace third-party-advisory