Auth bypass in Surrealdb
CVE-2026-109343
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.
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-2v9j-645m-pcrq (vendor-advisory)
- www.vulncheck.com/advisories/surrealdb-before-3.3.0-cross-tenant-access-via-use… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109343?
- CVE-2026-109343 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-2026-109343?
- High severity. CVSS v3 base score is 8.1 out of 10.