CVE-2026-63753 surrealdb CVE debrief

Who should care

Users of SurrealDB versions prior to 3.1.0 should be aware of this vulnerability and take necessary actions to upgrade or mitigate the risk. This includes reviewing and updating authentication and authorization mechanisms for LIVE SELECT subscriptions, monitoring for potential unauthorized access to real-time notifications, and planning vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Technical summary

The vulnerability exists in SurrealDB's handling of LIVE SELECT subscriptions. When a session's authentication state changes, the database fails to update the authentication state for these subscriptions. This allows an attacker with revoked or expired session credentials to continue receiving real-time notifications until the connection is closed. The vulnerability is caused by a failure to refresh authentication state in LIVE SELECT subscriptions when session state changes. This issue affects SurrealDB versions prior to 3.1.0.

Defensive priority

Medium priority should be given to upgrading SurrealDB to version 3.1.0 or later, as this vulnerability allows for unauthorized access to real-time notifications.

Recommended defensive actions

• Upgrade SurrealDB to version 3.1.0 or later
• Review and update authentication and authorization mechanisms for LIVE SELECT subscriptions
• Monitor for and respond to potential unauthorized access to real-time notifications
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-20T12:19:45.150Z and last modified on 2026-07-21T18:37:56.803Z. The NVD entry is currently Awaiting Analysis. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The CVE record does not provide specific details about the vulnerability's impact or exploitation. However, it is known that the vulnerability affects SurrealDB versions prior to 3.1.0 and has a CVSS score of 5.3, classified as MEDIUM severity.

Official resources