Threat database

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.

CVE-2026-103471 is a high-severity vulnerability in Corvusoft restbed up to version 5.0.0 where HTTP request headers are buffered without a maximum size limit. This allows remote unauthenticated attackers to exhaust server memory by opening TCP connections and streaming bytes indefinitely without sending the header delimiter, causing unbounded heap memory allocation until the server process is terminated.