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

Quick assessment

Affected
surrealdb surrealdb
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

surrealdb是SurrealDB公司开源的一个文档图数据库。 SurrealDB 2.0.5之前版本、2.1.x版本至2.1.5之前版本和2.2.x版本至2.2.2之前版本存在资源管理错误漏洞，该漏洞源于通过DEFINE FUNCTION使用嵌套FOR循环定义自定义数据库函数时，未对多重循环的迭代次数进行约束，导致可以执行消耗所有服务器CPU时间的函数，造成服务器对其它查询和连接无响应。

CVSS 7.1 · High EPSS 0.55% · P44

Affected Version Matrix 6

VendorProduct Version RangeStatus
surrealdb surrealdb < 2.2.2 affected
2.2.2 unaffected
< 2.1.5 affected
2.1.5 unaffected
< 2.0.5 affected
2.0.5 unaffected
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I. Basic Information for CVE-2025-71397

Vulnerability Information
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Vulnerability Title
SurrealDB before 2.2.2 CPU Exhaustion via nested FOR loops
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
SurrealDB 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
surrealdb是SurrealDB公司开源的一个文档图数据库。 SurrealDB 2.0.5之前版本、2.1.x版本至2.1.5之前版本和2.2.x版本至2.2.2之前版本存在资源管理错误漏洞，该漏洞源于通过DEFINE FUNCTION使用嵌套FOR循环定义自定义数据库函数时，未对多重循环的迭代次数进行约束，导致可以执行消耗所有服务器CPU时间的函数，造成服务器对其它查询和连接无响应。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
surrealdb surrealdb 0 ~ 2.2.2 -
surrealdb surrealdb 0 ~ 2.1.5 -
surrealdb surrealdb 0 ~ 2.0.5 -

II. Public POCs for CVE-2025-71397

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5836 chars
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Trigger conditions & impact
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2025-71397

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Vendor Advisories for CVE-2025-71397 (2)

Same Patch Batch · surrealdb · 2026-07-18 · 24 CVEs total

CVE-2025-71392 9.4 CRITICAL SurrealDB before 2.2.2 SurrealQL Injection via export
CVE-2024-58362 8.8 HIGH SurrealDB before 1.5.5 Query Injection via RPC API
CVE-2023-54366 8.8 HIGH SurrealDB before 1.0.1 Insecure Default Table Permissions
CVE-2024-58366 8.5 HIGH SurrealDB before 1.1.1 Format String via Scripting Functions
CVE-2024-58368 7.5 HIGH SurrealDB before 1.1.0 Denial of Service via HTTP Headers
CVE-2025-71395 7.1 HIGH SurrealDB before 2.2.2 Memory Exhaustion via string::replace
CVE-2025-71391 7.1 HIGH SurrealDB before 2.2.2 Denial of Service via /sql endpoint
CVE-2024-58367 7.1 HIGH SurrealDB before 2.0.4 Improper Authorization via SELECT Permissions
CVE-2024-58365 6.5 MEDIUM SurrealDB before 1.2.0 Denial of Service via Nonexistent Function
CVE-2024-58369 6.5 MEDIUM SurrealDB before 1.1.1 Denial of Service via Global Parameters
CVE-2024-58361 6.5 MEDIUM SurrealDB before 2.0.4 Denial of Service via Parser Exception
CVE-2024-58370 6.5 MEDIUM SurrealDB before 1.1.0 Uncontrolled Recursion Denial of Service
CVE-2024-58357 6.5 MEDIUM SurrealDB before 2.1.0 Denial of Service via rand::time()
CVE-2024-58359 6.5 MEDIUM SurrealDB before 2.1.0 Denial of Service via rand() Sorting
CVE-2024-58364 6.5 MEDIUM SurrealDB before 1.2.1 Denial of Service via Parsing Error
CVE-2024-58363 6.3 MEDIUM SurrealDB before 1.5.4 Authentication Bypass via Database Switch
CVE-2025-71393 6.0 MEDIUM SurrealDB before 2.2.2 Memory Exhaustion via Nested Functions
CVE-2025-71398 5.8 MEDIUM SurrealDB before 2.2.2 SSRF via HTTP Redirect Bypass
CVE-2025-71390 5.8 MEDIUM SurrealDB before 2.3.6 deny-net Bypass via DNS Resolution
CVE-2024-58358 4.9 MEDIUM SurrealDB before 2.1.0 Denial of Service via Nonexistent Role

Showing top 20 of 24 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: surrealdb
Same vendor: surrealdb
Same weakness: CWE-835

V. Comments for CVE-2025-71397

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