SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
Published Jul 20, 2026 · Updated Oct 23, 2026
Original summary
Normalized public record · Updated Oct 23, 2026
SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
SurrealDB versions before 3.1.0 fail to apply the SURREAL_WEBSOCKET_MAX_MESSAGE_SIZE limit to anonymous /sql WebSocket connections, allowing attackers to buffer unbounded frames in the per-connection read buffer. Attackers can stream WebSocket frames larger than the configured limit across multiple concurrent connections to consume excessive memory and degrade /sql availability.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- Security advisory ↗
- VulnCheck Advisory: SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket ↗
Record history
Published Jul 20, 2026 · Last refreshed Oct 23, 2026