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

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 2.2.2之前版本存在资源管理错误漏洞，该漏洞源于string::replace函数在使用正则表达式时未限制结果字符串长度，可能导致内存耗尽，允许经过身份验证的攻击者通过无界字符串分配构造恶意查询，造成拒绝服务。

CVSS 7.1 · High EPSS 0.45% · P39 Updated Oct 30, 2026

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 6

Vendor	Product	Version Range	Status
surrealdb	surrealdb	`2.2.0< 2.2.2`	affected
		`2.2.2`	unaffected
		`2.1.0< 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-2025-71395

Vulnerability Information

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Vulnerability Title

SurrealDB before 2.2.2 Memory Exhaustion via string::replace

Source: CVE Program / CVE List V5

Vulnerability 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.

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

未经控制的内存分配

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

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
surrealdb	surrealdb	2.2.0 ~ 2.2.2	-
surrealdb	surrealdb	2.1.0 ~ 2.1.5	-
surrealdb	surrealdb	0 ~ 2.0.5	-

II. Public POCs for CVE-2025-71395

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2025-71395

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Vendor Advisories for CVE-2025-71395 (2)

🔗 Memory exhaustion via string::replace using regex · Advisory · surrealdb/surrealdb · GitHub Read full article vendor-advisory
🔗 SurrealDB before 2.2.2 Memory Exhaustion via string::replace | Advisories | VulnCheck third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2025-71395

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-2023-54366	8.8 HIGH	SurrealDB before 1.0.1 Insecure Default Table Permissions
CVE-2024-58362	8.8 HIGH	SurrealDB before 1.5.5 Query Injection via RPC API
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-2025-71391	7.1 HIGH	SurrealDB before 2.2.2 Denial of Service via /sql endpoint
CVE-2025-71397	7.1 HIGH	SurrealDB before 2.2.2 CPU Exhaustion via nested FOR loops
CVE-2024-58367	7.1 HIGH	SurrealDB before 2.0.4 Improper Authorization via SELECT Permissions
CVE-2024-58357	6.5 MEDIUM	SurrealDB before 2.1.0 Denial of Service via rand::time()
CVE-2024-58370	6.5 MEDIUM	SurrealDB before 1.1.0 Uncontrolled Recursion Denial of Service
CVE-2024-58361	6.5 MEDIUM	SurrealDB before 2.0.4 Denial of Service via Parser Exception
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-2024-58359	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 → →

IV. Related Vulnerabilities

Same product: surrealdb

Same vendor: surrealdb

Same weakness: CWE-789