Auth bypass in Surrealdb
CVE-2026-109334
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/surrealdb/surrealdb/security/advisories/GHSA-w5v9-jc5f-5rmc (vendor-advisory)
- www.vulncheck.com/advisories/surrealdb-before-3.3.0-cross-tenant-access-via-sur… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109334?
- CVE-2026-109334 is a high-severity vulnerability in Surrealdb, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-10-12.
- How severe is CVE-2026-109334?
- High severity. CVSS v3 base score is 8.1 out of 10.