CVE-2026-63750 SurrealDB before 3.1.0 Memory Amplification via /sql WebSocket
Attackers can exhaust memory via unbounded WebSocket frames in SurrealDB, causing denial of service for SQL endpoints.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63750?
CVE-2026-63750 is a medium-severity denial of service vulnerability in Surrealdb Surrealdb, published on 20 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-770
Which versions are affected by CVE-2026-63750?
It affects 1 product.
Products include Surrealdb Surrealdb.
How do I fix CVE-2026-63750?
No fix has been published for CVE-2026-63750 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-63750 being exploited?
There is no known exploitation of CVE-2026-63750 in the wild and no public exploit code.
Other vulnerabilities in Surrealdb Surrealdb
- CVE-2025-71392 SurrealDB before 2.2.2 SurrealQL Injection via export
- CVE-2026-63756 SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition
- CVE-2026-63747 SurrealDB before 3.1.0 Denial of Service via malformed RPC use
- CVE-2026-63757 SurrealDB before 3.1.0 Session Hijacking via /rpc sessions
- CVE-2026-63760 SurrealDB before 3.1.0 Denial of Service via JSON Parser
Sources
Also known as GHSA-qg3v-r4m7-x5f5.