CVE-2026-63750
MEDIUMSurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-65rj-r9fh-jp2v)
https://github.com/surrealdb/surrealdb/security/advisories/GHSA-65rj-r9fh-jp2v
Third Party Advisory third-party-advisory
VulnCheck Advisory: SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
https://www.vulncheck.com/advisories/surrealdb-before-memory-amplification-via-sql-websocket
Scores
CVSS v3
5.3
EPSS
0.0028
EPSS Percentile
20.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (2)
surrealdb/surrealdb
< 3.1.0 (2 CPE variants)
surrealdb/surrealdb
3.1.0
Published
Jul 20, 2026
Tracked Since
Jul 20, 2026