CVE-2026-63750
SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | surrealdb |
| Product | surrealdb |
| Published | Jul 20, 2026 |
Stay Ahead of the Next One
Get instant alerts for surrealdb surrealdb
Be the first to know when new medium vulnerabilities affecting surrealdb surrealdb are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
surrealdb / surrealdb
0 < 3.1.0