{"id":"CVE-2026-103472","title":"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","summary":"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 s…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"Corvusoft","product":"restbed","affected":["restbed <= 5.0.0"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T19:08:43.927","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103472","references":[{"url":"https://github.com/Corvusoft/restbed","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/web_socket_impl.cpp#L117","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Corvusoft/restbed/issues/558","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/restbed-through-5.0.0-websocket-memory-exhaustion-via-unbounded-frame-buffering","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-30T18:17:24.548Z","slug":"CVE-2026-103472","body":"## Overview\n\nrestbed 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}