CVE-2026-63750
SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
- State
- Published
- Severity
- 6.9 Medium
- Published
- Jul 20, 2026
- Updated
- Jul 28, 2026
- Reserved
- Jul 18, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | VulnCheck |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
surrealdbsurrealdb |
|
References
- GitHub Security Advisory (GHSA-65rj-r9fh-jp2v)vendor-advisory
- VulnCheck Advisory: SurrealDB before 3.1.0 Memory Amplification via /sql WebSocketthird-party-advisory
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