CVE-2026-63737 Details
Description
SurrealDB versions before 3.1.5 contain a denial of service vulnerability where authenticated users can crash the server with queries containing long chains of operators. Attackers can submit queries with tens of thousands of chained operators that create unbounded expression trees, causing stack overflow during query processing and aborting the entire process.
A denial-of-service vulnerability has been identified in SurrealDB versions prior to 3.1.5. This issue allows authenticated users to crash the server by executing queries that contain long chains of operators. Such queries can include tens of thousands of chained operators, which create unbounded expression trees. This leads to a stack overflow during query processing, causing the entire server process to abort.
Users can upgrade to SurrealDB version 3.1.5 or later to address this vulnerability. For those unable to patch, it is recommended to restrict untrusted users from executing arbitrary queries, limit access to the WebSocket '/rpc' endpoint, and use an orchestrator or process manager that automatically restarts the server after a crash.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/surrealdb/surrealdb/security/advisories/GHSA-jv2j-mqmw-xvv5 | [email protected] | Vendor AdvisoryMitigation |
| https://www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-deep-operator-chains | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-674 | Uncontrolled Recursion | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| surrealdb surrealdb | >= 3.0.0, < 3.1.5 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | Initial Analysis | [email protected] |
| Jul 20, 2026 | CVE Modified | CISA-ADP |
| Jul 20, 2026 | New CVE Received | [email protected] |