CVE-2026-63749: surrealdb Auth Bypass — Fix

Description

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.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
surrealdb	surrealdb	< 3.1.0

References

Advisories & Patches

https://github.com/surrealdb/surrealdb/security/advisories/GHSA-6wqw-vhfr-9999

Other References

https://www.vulncheck.com/advisories/surrealdb-before-authentication-bypass-via-live-select

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-63749? +

CVE-2026-63749 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-63749? +

CVE-2026-63749 affects products from surrealdb, specifically: surrealdb. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-63749? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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