CVE-2026-63760 surrealdb CVE debrief

Who should care

Users of SurrealDB versions before 3.1.0 should be aware of this vulnerability and take steps to mitigate it. This includes upgrading to version 3.1.0 or later, and monitoring for suspicious activity. Operators, platform administrators, vulnerability management teams, and security teams may be impacted by this vulnerability.

Technical summary

The vulnerability is caused by the lack of enforcement of the recursion depth limit in the JSON parser of SurrealDB before version 3.1.0. This allows attackers to send deeply nested JSON payloads that can cause a denial-of-service condition by exhausting server memory and crashing the process via the WebSocket /rpc endpoint. The vulnerability has a CVSS score of 8.7 and is considered HIGH severity.

Defensive priority

High

Recommended defensive actions

• Upgrade to SurrealDB version 3.1.0 or later
• Monitor for suspicious activity
• Implement additional security measures to prevent denial-of-service attacks
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was reported by Vulncheck and is tracked as GHSA-q729-696q-g9pq. The NVD entry for this vulnerability is currently awaiting analysis. This information is based on the CVE record and NVD details. Further verification is recommended to confirm affected scope and severity.

Official resources