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CVE-2026-109334— SurrealDB before 3.3.0 Cross-Tenant Access via Surreal-NS/Surreal-DB Headers and RPC use

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 3.3.0 之前的版本在验证命名空间或数据库级别的系统用户认证时，未对用户所选的命名空间或数据库与认证层级进行交叉校验，从而导致跨租户访问漏洞。经过身份验证的攻击者可以通过在 接口设置 或 请求头，或调用 RPC 的 方法，在其他租户（只要其表权限允许）中读取、创建、修改和删除数据行，并读取 定义的值。

CVSS 8.1 · High EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

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-2026-109334

Vulnerability Information
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Vulnerability Title
SurrealDB before 3.3.0 Cross-Tenant Access via Surreal-NS/Surreal-DB Headers and RPC use
Source: CVE Program / CVE List V5
Vulnerability Description
SurrealDB before 3.3.0 does not check the caller-selected namespace or database against the level at which a namespace- or database-level system user authenticated, allowing cross-tenant access. An authenticated attacker can set the Surreal-NS/Surreal-DB headers on /sql or call the RPC use method to read, create, modify, and delete rows and read DEFINE PARAM values in another tenant where table PERMISSIONS allow it.
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-2026-109334

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III. Intelligence Information for CVE-2026-109334

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Vendor Advisories for CVE-2026-109334 (1)

News Coverage for CVE-2026-109334 (1)

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

CVE-2026-109343 8.1 HIGH SurrealDB before 3.3.0 Cross-Tenant Access via USE Statement
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-2026-109334

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