CVE-2026-63750

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-65rj-r9fh-jp2v	Vendor Advisory Mitigation
https://www.vulncheck.com/advisories/surrealdb-before-memory-amplification-via-sql-websocket	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:surrealdb:surrealdb:*:*:*:*:*:*:*:*

History

22 Jul 2026, 15:41

Type	Values Removed	Values Added
CPE		cpe:2.3:a:surrealdb:surrealdb::::::::
First Time		Surrealdb Surrealdb surrealdb
References	~~() https://github.com/surrealdb/surrealdb/security/advisories/GHSA-65rj-r9fh-jp2v -~~	() https://github.com/surrealdb/surrealdb/security/advisories/GHSA-65rj-r9fh-jp2v - Vendor Advisory, Mitigation
References	~~() https://www.vulncheck.com/advisories/surrealdb-before-memory-amplification-via-sql-websocket -~~	() https://www.vulncheck.com/advisories/surrealdb-before-memory-amplification-via-sql-websocket - Third Party Advisory

20 Jul 2026, 12:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-20 12:19

Updated : 2026-07-22 15:41

NVD link : CVE-2026-63750

Mitre link : CVE-2026-63750

CVE.ORG link : CVE-2026-63750

JSON object : View

Products Affected

surrealdb

surrealdb

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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