Auth bypass in Surrealdb
CVE-2026-63751
SurrealDB versions before 3.1.0 contain a field-level permission bypass vulnerability in JSON Patch operations that allows authenticated users to read protected fields. Attackers can use UPDATE PATCH with an empty from pointer in copy or move operations to duplicate all record fields, including those restricted by field-level SELECT permissions, into attacker-chosen destination fields.
Vulnerability class: Broken Access Control
EPSS: 0.003 (21.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Surrealdb — versions 0, 3.1.0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory, Mitigation, Vendor Advisory)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-63751?
- CVE-2026-63751 is a medium-severity vulnerability in Surrealdb, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-07-20.
- How severe is CVE-2026-63751?
- Medium severity. CVSS v3 base score is 4.3 out of 10.