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CVE-2026-63759— SurrealDB before 3.1.0 Denial of Service nested type annotations

Quick assessment

Affected
surrealdb surrealdb
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 3.1.0之前版本存在资源管理错误漏洞，该漏洞源于在类型/种类解析器中处理嵌套类型注释时未能强制执行递归深度限制，可能导致经过身份验证的攻击者发送带有深度嵌套类型注释的查询，耗尽服务器内存并崩溃进程。

CVSS 6.5 · Medium EPSS 0.45% · P36

Possible ATT&CK Techniques 2 AI

T1079 T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
surrealdb surrealdb < 3.1.0 affected
3.1.0 unaffected
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I. Basic Information for CVE-2026-63759

Vulnerability Information
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Vulnerability Title
SurrealDB before 3.1.0 Denial of Service nested type annotations
Source: CVE Program / CVE List V5
Vulnerability Description
SurrealDB before 3.1.0 fails to enforce recursion depth limits in the type/kind parser when processing nested type annotations. Authenticated attackers can send queries with deeply nested type annotations to exhaust server memory and crash the process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
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 3.1.0之前版本存在资源管理错误漏洞，该漏洞源于在类型/种类解析器中处理嵌套类型注释时未能强制执行递归深度限制，可能导致经过身份验证的攻击者发送带有深度嵌套类型注释的查询，耗尽服务器内存并崩溃进程。
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 ~ 3.1.0 -

II. Public POCs for CVE-2026-63759

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III. Intelligence Information for CVE-2026-63759

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Vendor Advisories for CVE-2026-63759 (2)

Same Patch Batch · surrealdb · 2026-07-20 · 31 CVEs total

CVE-2026-63757 8.8 HIGH SurrealDB before 3.1.0 Session Hijacking via /rpc sessions
CVE-2026-63735 8.1 HIGH SurrealDB before 3.2.0 Authentication Bypass via Custom API
CVE-2026-63756 8.1 HIGH SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition
CVE-2026-63739 7.7 HIGH SurrealDB before 3.1.5 Arbitrary File Read via DEFINE ANALYZER
CVE-2026-63763 7.5 HIGH SurrealDB before 2.5.0 Privilege Escalation via Future Fields
CVE-2026-63747 7.5 HIGH SurrealDB before 3.1.0 Denial of Service via malformed RPC use
CVE-2026-63760 7.5 HIGH SurrealDB before 3.1.0 Denial of Service via JSON Parser
CVE-2026-63755 6.5 MEDIUM SurrealDB before 3.1.0 Permission Bypass via WHERE Clause
CVE-2026-63740 6.5 MEDIUM SurrealDB before 3.1.4 Array Element Permission Bypass
CVE-2026-63737 6.5 MEDIUM SurrealDB before 3.1.5 Denial of Service via deep operator chains
CVE-2026-63741 6.5 MEDIUM SurrealDB before 3.1.0 Authentication Bypass via USE statement
CVE-2026-63754 6.5 MEDIUM SurrealDB before 3.1.0 Denial of Service via LIVE Query
CVE-2026-63746 6.5 MEDIUM SurrealDB before 3.1.0 Permission Bypass via Graph Traversal
CVE-2026-63743 6.4 MEDIUM SurrealDB before 3.1.0 Port-Specific Deny Rule Bypass via HTTP Redirect
CVE-2026-63762 6.0 MEDIUM SurrealDB before v2.6.1 Denial of Service via scripting
CVE-2026-63745 5.4 MEDIUM SurrealDB before 3.1.0 Authorization Bypass via Composite Record-id
CVE-2026-63758 5.4 MEDIUM SurrealDB before 3.1.0 Authorization Bypass via KILL Statement
CVE-2026-63750 5.3 MEDIUM SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
CVE-2026-63734 4.9 MEDIUM SurrealDB before 3.2.0 Denial of Service via malformed SurrealML import
CVE-2026-63748 4.3 MEDIUM SurrealDB before 3.1.0 Information Disclosure via Error Messages

Showing top 20 of 31 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: surrealdb
Same vendor: surrealdb
Same weakness: CWE-674

V. Comments for CVE-2026-63759

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