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CVE-2026-109343— SurrealDB before 3.3.0 Cross-Tenant Access via USE Statement

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.

在 SurrealDB 3.3.0 之前的版本中，存在跨租户访问漏洞，原因是 SurrealQL 的 USE 语句可以在不进行身份验证权限检查的情况下，将会话切换到任何命名空间或数据库。经过身份验证的命名空间、数据库或记录级别用户，能够切换到其他租户，并在权限允许（例如 PERMISSIONS FULL）的情况下，读取、创建、更新或删除这些租户下表格中的数据行。

CVSS 8.1 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
surrealdb surrealdb < 3.3.0 affected
3.3.0 unaffected
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I. Basic Information for CVE-2026-109343

Vulnerability Information
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Vulnerability Title
SurrealDB before 3.3.0 Cross-Tenant Access via USE Statement
Source: CVE Program / CVE List V5
Vulnerability Description
SurrealDB before 3.3.0 allows cross-tenant access because the SurrealQL USE statement switches a session to any namespace/database without checking that the caller's authenticated level covers it. Authenticated namespace, database, or record users can switch to another tenant and read, create, update, or delete rows in tables whose PERMISSIONS allow it, such as PERMISSIONS FULL.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
surrealdb surrealdb 0 ~ 3.3.0 -

II. Public POCs for CVE-2026-109343

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III. Intelligence Information for CVE-2026-109343

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Vendor Advisories for CVE-2026-109343 (2)

Same Patch Batch · surrealdb · 2026-10-12 · 11 CVEs total

CVE-2026-109334 8.1 HIGH SurrealDB before 3.3.0 Cross-Tenant Access via Surreal-NS/Surreal-DB Headers and RPC use
CVE-2026-109341 7.1 HIGH SurrealDB before 3.3.0 Field Permission Bypass via PATCH copy/move/test Operations
CVE-2026-109333 6.5 MEDIUM SurrealDB 3.0.0 before 3.3.0 Cross-Tenant Record Read via RETURN FETCH
CVE-2026-109338 6.5 MEDIUM SurrealDB before 3.3.0 Denial of Service via Headers Non-ASCII Values
CVE-2026-109335 6.5 MEDIUM SurrealDB 3.0.0 before 3.3.0 Information Disclosure via COMPUTED Fields
CVE-2026-109340 5.4 MEDIUM SurrealDB 3.1.0 before 3.3.0 Authorization Bypass via REFERENCE ON DELETE CASCADE
CVE-2026-109342 5.4 MEDIUM SurrealDB 3.0.0 before 3.3.0 Missing Authentication in revoke RPC Method
CVE-2026-109339 4.9 MEDIUM SurrealDB 3.1.0 before 3.3.0 Memory Exhaustion via Surrealism Module Output Buffering
CVE-2026-109337 4.3 MEDIUM SurrealDB before 3.3.0 Field Permission Bypass via LIVE SELECT WHERE Clause
CVE-2026-109336 4.3 MEDIUM SurrealDB before 3.3.0 Field Permission Bypass via LIVE SELECT $before/$after

IV. Related Vulnerabilities

Same product: surrealdb
Same vendor: surrealdb
Same weakness: CWE-639

V. Comments for CVE-2026-109343

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