CVE-2026-63750: medium-severity vulnerability in surrealdb
SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.9epss 0.5%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Affected products
surrealdb · surrealdbRelated CVEs — surrealdb
In the same product, most dangerous first.
CVE-2024-58368HIGHSurrealDB before 1.1.0 Denial of Service via HTTP HeadersEPSS 0.7%CVE-2024-58362HIGHSurrealDB before 1.5.5 Query Injection via RPC APIEPSS 0.6%CVE-2024-58366CRITICALSurrealDB before 1.1.1 Format String via Scripting FunctionsEPSS 0.6%CVE-2025-71391HIGHSurrealDB before 2.2.2 Denial of Service via /sql endpointEPSS 0.6%CVE-2025-71397HIGHSurrealDB before 2.2.2 CPU Exhaustion via nested FOR loopsEPSS 0.6%CVE-2025-71396LOWSurrealDB before 2.2.2 Denial of Service via JavaScript ScriptingEPSS 0.6%