VULNERABILITY INTELLIGENCE

CVE-2026-63750

CVSS score5.3 MEDIUM
EPSS probability0.49%
CISA KEVNot currently listed
Published2026-07-20
Last modified2026-07-22
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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 classification

  • disclosure@vulncheck.com: CWE-770

Primary references