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CVE-2025-71391— SurrealDB before 2.2.2 Denial of Service via /sql endpoint

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之前版本存在异常处理不当漏洞，该漏洞源于net模块中存在未捕获异常，允许经过身份验证的攻击者通过向/sql端点发送包含空字节的特制HTTP查询，导致SurrealDB实例及依赖应用程序崩溃。

CVSS 7.1 · High EPSS 0.56% · P46 Updated Oct 30, 2026

Possible ATT&CK Techniques 2 AI

T1190 · Exploit Public-Facing Application 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-2025-71391

Vulnerability Information

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Vulnerability Title

SurrealDB before 2.2.2 Denial of Service via /sql endpoint

Source: CVE Program / CVE List V5

Vulnerability Description

SurrealDB versions before 2.2.2 contain an uncaught exception vulnerability in the net module that allows authenticated users to crash the database. Attackers can send crafted HTTP queries containing null bytes to the /sql endpoint, causing an unhandled exception that crashes the SurrealDB instance and any dependent applications.

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

未捕获的异常

Source: CVE Program / CVE List V5

Vulnerability Title

SurrealDB 异常处理不当漏洞

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-2025-71391

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2025-71391

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Vendor Advisories for CVE-2025-71391 (2)

🔗 Uncaught exception in Net module leads to database crash · Advisory · surrealdb/surrealdb · GitHub vendor-advisory
🔗 SurrealDB before 2.2.2 Denial of Service via /sql endpoint | Advisories | VulnCheck third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2025-71391

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-2025-71397	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-2024-58365	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 → →

IV. Related Vulnerabilities

Same product: surrealdb

Same vendor: surrealdb

Same weakness: CWE-248