Описание
ws before 8.21.1 contains a memory exhaustion vulnerability in lib/receiver.js where the fragment guard only triggers when fragment count reaches maxFragments, allowing attackers to exhaust memory by sending incomplete fragmented WebSocket messages. Attackers can send a text frame with FIN=0 followed by continuation frames without completing the sequence, causing each fragment to be stored as a separate Buffer object with significant overhead, enabling denial of service through heap exhaustion.
ws before 8.21.1 contains a memory exhaustion vulnerability in lib/receiver.js where the fragment guard only triggers when fragment count reaches maxFragments, allowing attackers to exhaust memory by sending incomplete fragmented WebSocket messages. Attackers can send a text frame with FIN=0 followed by continuation frames without completing the sequence, causing each fragment to be stored as a separate Buffer object with significant overhead, enabling denial of service through heap exhaustion.
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2026-62389
- https://github.com/websockets/ws/issues/2331
- https://github.com/websockets/ws/commit/f197ac65140920bdcecdab74bfc69c2d7858e55d
- https://github.com/websockets/ws/releases/tag/8.21.1
- https://www.vulncheck.com/advisories/ws-default-maxfragments-allows-memory-exhaustion-dos
Связанные уязвимости
ws before 8.21.1 contains a memory exhaustion vulnerability in lib/receiver.js where the fragment guard only triggers when fragment count reaches maxFragments, allowing attackers to exhaust memory by sending incomplete fragmented WebSocket messages. Attackers can send a text frame with FIN=0 followed by continuation frames without completing the sequence, causing each fragment to be stored as a separate Buffer object with significant overhead, enabling denial of service through heap exhaustion.
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority as a duplicate of CVE-2026-48779.
