CVE-2026-103472
restbed through 5.0.0 accepts WebSocket frames with declared payload lengths up to 2^63 bytes and buffers the payload without size limits in an unbounded stream buffer. Remote unauthenticated attackers can declare large frame sizes and stream payload data to exhaust server memory, causing denial of service through process crash.
- Published Sep 30, 2026
- CVSS 8.7 high
- 0.4% chance of exploitation in the next 30 days (EPSS)