{"id":"CVE-2026-54466","aliases":["GHSA-xv26-6w52-cph6"],"url":"https://o3.security/vulnerability/CVE-2026-54466","summary":"websocket-driver: Message corruption via abuse of protocol length headers","details":"websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.7.5, the frame format in draft versions of the WebSocket protocol includes a length header that allows an arbitrarily large integer to be encoded as a sequence of bytes with the high bit set. By sending an indefinite sequence of bytes with values 0x80 or above, a client can make the server parse these bytes into an ever-growing integer in lib/websocket/driver/draft75.js; because JavaScript numbers are 64-bit floating point values, this number will eventually lose precision and lead to the subsequent payload being parsed incorrectly. This issue is fixed in version 0.7.5.","published":"2026-07-17T20:53:24.769Z","modified":"2026-08-12T03:51:35.726109898Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"websocket-driver","fixedVersion":"0.7.5"}],"fix":{"url":"https://github.com/faye/websocket-driver-node/commit/5b197ca874dab58e96cacad8a3c256797d804680","label":"faye/websocket-driver-node@5b197ca"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54466.json"},{"type":"ADVISORY","url":"https://github.com/faye/websocket-driver-node/security/advisories/GHSA-xv26-6w52-cph6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54466"},{"type":"FIX","url":"https://github.com/faye/websocket-driver-node/commit/5b197ca874dab58e96cacad8a3c256797d804680"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:35.726109898Z"}}