NPM: mediasoup: SCTP state cookie lacks cryptographic authentication, enabling unauthorized association establishment (RFC 9260 violation)

NPM: mediasoup: SCTP state cookie lacks cryptographic authentication, enabling unauthorized association establishment RFC 9260 violation vulnerability discovered by ? in WordPress Npm mediasoup versions = 3.20.0, = 3.20.5...

CVE-2026-55663 mediasoup: SCTP state cookie lacks cryptographic authentication, enabling unauthorized association establishment (RFC 9260 violation)

mediasoup is a WebRTC video conferencing system. From version 3.20.0 until 3.20.6 for the npm package and from 0.22.0 until 0.22.5 for the Rust crate, mediasoup's built-in SCTP stack authenticates state cookies using only the hardcoded msworker and 0xAD81 magic values instead of a per-instance...

CVE-2026-55663

mediasoup , a WebRTC video conferencing system, contains a flaw in its built-in SCTP stack where state cookies are authenticated using only hardcoded magic values (msworker and 0xAD81) instead of a per-instance secret with HMAC, violating RFC 9260 §5.1.3. An on-path attacker targeting PlainTransp...

EUVD-2026-65694

mediasoup is a WebRTC video conferencing system. From version 3.20.0 until 3.20.6 for the npm package and from 0.22.0 until 0.22.5 for the Rust crate, mediasoup's built-in SCTP stack authenticates state cookies using only the hardcoded msworker and 0xAD81 magic values instead of a per-instance...