Medium severity5.3NVD Advisory· Published Jul 20, 2026· Updated Jul 22, 2026
CVE-2026-63750
CVE-2026-63750
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.
Affected products
2Patches
Vulnerability mechanics
References
2- github.com/surrealdb/surrealdb/security/advisories/GHSA-65rj-r9fh-jp2vnvdVendor AdvisoryMitigation
- www.vulncheck.com/advisories/surrealdb-before-memory-amplification-via-sql-websocketnvdThird Party Advisory
News mentions
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