What is CVE-2026-63749?

CVE-2026-63749 is a medium-severity vulnerability in Surrealdb, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-07-20.

How severe is CVE-2026-63749?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Surrealdb

CVE-2026-63749

SurrealDB versions before 3.1.0 contain an authentication bypass vulnerability in LIVE SELECT subscriptions where permission expressions referencing $value, $before, $after, or $event are evaluated against attacker-controlled bindings instead of actual documents. Authenticated subscribers can bind chosen values to these parameter names and register LIVE SELECT queries to receive notifications for records that SELECT permission expressions should have hidden.

Vulnerability class: Broken Access Control

EPSS: 0.004 (29.0th 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)

CWE-863 — Incorrect Authorization

References

disclosure@vulncheck.com (vendor-advisory, Mitigation, Vendor Advisory)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-63749?: CVE-2026-63749 is a medium-severity vulnerability in Surrealdb, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-07-20.
How severe is CVE-2026-63749?: Medium severity. CVSS v3 base score is 4.3 out of 10.