Auth bypass in Surrealdb
CVE-2026-63763
SurrealDB before 2.5.0 and before 3.0.0-beta.3 contains a confused deputy privilege escalation vulnerability. Unprivileged users (e.g., those with the database editor role) can create or modify fields containing futures, functions, or closures. Because these are executed in the context of the invoking/querying user rather than their creator, an attacker can plant malicious logic that executes with a higher-privileged user's permissions when that user reads or writes the affected record. This can lead to full privilege escalation, including creation of a root owner and server takeover.
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.005 (40.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Surrealdb — versions 3.0.0-beta.3, 3.0.0, 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-2026-63763?
- CVE-2026-63763 is a high-severity vulnerability in Surrealdb, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.8/10. Published 2026-07-20.
- How severe is CVE-2026-63763?
- High severity. CVSS v3 base score is 8.8 out of 10.