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CVE-2026-63734— SurrealDB before 3.2.0 Denial of Service via malformed SurrealML import

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 3.2.0之前版本存在输入验证错误漏洞，该漏洞源于SurrealML标头解析器存在输入验证错误，经过身份验证的Owner角色用户通过上传非数字输入维度或其他格式错误的标头字段触发未检查的unwrap调用，导致服务器进程崩溃并拒绝服务。

CVSS 4.9 · Medium EPSS 0.47% · P39

Affected Version Matrix 2

VendorProduct Version RangeStatus
surrealdb surrealdb < 3.2.0 affected
3.2.0 unaffected
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I. Basic Information for CVE-2026-63734

Vulnerability Information
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Vulnerability Title
SurrealDB before 3.2.0 Denial of Service via malformed SurrealML import
Source: CVE Program / CVE List V5
Vulnerability Description
SurrealDB versions before 3.2.0 contain a denial of service vulnerability in the SurrealML header parser that allows authenticated Owner-role users to crash the server by uploading a malformed .surml file to the /ml/import endpoint. Attackers can supply non-numeric input-dimensions or other malformed header fields that trigger unchecked unwrap calls, causing a panic that aborts the entire server process and denies service to all databases.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
SurrealDB 输入验证错误漏洞
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 3.2.0之前版本存在输入验证错误漏洞，该漏洞源于SurrealML标头解析器存在输入验证错误，经过身份验证的Owner角色用户通过上传非数字输入维度或其他格式错误的标头字段触发未检查的unwrap调用，导致服务器进程崩溃并拒绝服务。
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 ~ 3.2.0 -

II. Public POCs for CVE-2026-63734

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III. Intelligence Information for CVE-2026-63734

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Vendor Advisories for CVE-2026-63734 (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-2026-63756 8.1 HIGH SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition
CVE-2026-63735 8.1 HIGH SurrealDB before 3.2.0 Authentication Bypass via Custom API
CVE-2026-63739 7.7 HIGH SurrealDB before 3.1.5 Arbitrary File Read via DEFINE ANALYZER
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-2026-63763 7.5 HIGH SurrealDB before 2.5.0 Privilege Escalation via Future Fields
CVE-2026-63746 6.5 MEDIUM SurrealDB before 3.1.0 Permission Bypass via Graph Traversal
CVE-2026-63754 6.5 MEDIUM SurrealDB before 3.1.0 Denial of Service via LIVE Query
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-2026-63740 6.5 MEDIUM SurrealDB before 3.1.4 Array Element Permission Bypass
CVE-2026-63755 6.5 MEDIUM SurrealDB before 3.1.0 Permission Bypass via WHERE Clause
CVE-2026-63759 6.5 MEDIUM SurrealDB before 3.1.0 Denial of Service nested type annotations
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-2026-63758 5.4 MEDIUM SurrealDB before 3.1.0 Authorization Bypass via KILL Statement
CVE-2026-63745 5.4 MEDIUM SurrealDB before 3.1.0 Authorization Bypass via Composite Record-id
CVE-2026-63750 5.3 MEDIUM SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
CVE-2026-63733 4.3 MEDIUM SurrealDB before 3.2.0 Permissions Bypass via PERMISSIONS Clause

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

IV. Related Vulnerabilities

Same product: surrealdb
Same vendor: surrealdb
Same weakness: CWE-20

V. Comments for CVE-2026-63734

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