What is CVE-2026-63758?

CVE-2026-63758 is a medium-severity vulnerability in Surrealdb, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-07-20.

How severe is CVE-2026-63758?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Surrealdb

CVE-2026-63758

SurrealDB versions before 3.1.0 contain an authorization bypass vulnerability in the KILL statement that allows authenticated database users to terminate other users' LIVE SELECT subscriptions. Attackers can issue KILL statements with target live query UUIDs to disrupt real-time data subscriptions of other users without ownership verification.

Vulnerability class: Broken Access Control

EPSS: 0.003 (23.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Surrealdb — versions 0, 3.1.0

Weakness classification (CWE)

CWE-862 — Missing 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-2026-63758?: CVE-2026-63758 is a medium-severity vulnerability in Surrealdb, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-07-20.
How severe is CVE-2026-63758?: Medium severity. CVSS v3 base score is 5.4 out of 10.