PatchSiren cyber security CVE debrief
CVE-2026-63749 surrealdb CVE debrief
CVE-2026-63749 is an authentication bypass vulnerability in SurrealDB versions before 3.1.0. The vulnerability exists in LIVE SELECT subscriptions where permission expressions referencing $value, $before, $after, or $event are evaluated against attacker-controlled bindings instead of actual documents. This allows authenticated subscribers to bind chosen values to these parameter names and register LIVE SELECT queries to receive notifications for records that SELECT permission expressions should have hidden. Users of SurrealDB versions before 3.1.0 should be aware of this authentication bypass vulnerability and take steps to mitigate it.
- Vendor
- surrealdb
- Product
- Unknown
- CVSS
- MEDIUM 5.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-20
- Original CVE updated
- 2026-07-22
- Advisory published
- 2026-07-20
- Advisory updated
- 2026-07-22
Who should care
Users of SurrealDB versions before 3.1.0 should be aware of this authentication bypass vulnerability and take steps to mitigate it. This vulnerability has a CVSS score of 5.3 and a severity of MEDIUM. Operators, platform administrators, vulnerability management teams, and security teams should review the vulnerability details and plan for mitigation.
Technical summary
The vulnerability exists in the LIVE SELECT subscriptions of SurrealDB versions before 3.1.0. Permission expressions referencing $value, $before, $after, or $event are evaluated against attacker-controlled bindings instead of actual documents. This allows authenticated subscribers to bind chosen values to these parameter names and register LIVE SELECT queries to receive notifications for records that SELECT permission expressions should have hidden. The vulnerability has a CVSS score of 5.3 and a severity of MEDIUM.
Defensive priority
Medium priority should be given to patching SurrealDB versions before 3.1.0 to prevent potential authentication bypass attacks.
Recommended defensive actions
- Patch SurrealDB to version 3.1.0 or later
- Review and update LIVE SELECT subscriptions to ensure proper permission expressions
- Monitor for suspicious activity in SurrealDB instances
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
- Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
- Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
- Check relevant monitoring, detection, and logs for exposed assets that need extra review.
Evidence notes
The CVE record was published on 2026-07-20T12:19:44.590Z and last modified on 2026-07-21T18:37:56.803Z. The NVD entry is currently Awaiting Analysis. This information is based on the provided source corpus. Further verification is recommended to confirm the accuracy of this information.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-20T12:19:44.590Z and has not been modified since then. The NVD entry is currently Awaiting Analysis.