{"cve":"CVE-2026-54466","nvd":{"published":"2026-07-17T21:17:08.657","modified":"2026-10-24T20:10:00.137","status":"Analyzed","description":"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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N","score":9.2},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-130"],"references":["https://github.com/faye/websocket-driver-node/commit/5b197ca874dab58e96cacad8a3c256797d804680","https://github.com/faye/websocket-driver-node/security/advisories/GHSA-xv26-6w52-cph6"],"products":["faye:websocket-driver"],"source":"nvd","synced_at":"2026-10-25T17:50:08.599881581+00:00"},"epss":{"cve":"CVE-2026-54466","score":0.0038,"percentile":0.31702,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-xv26-6w52-cph6","url":"https://osv.dev/vulnerability/GHSA-xv26-6w52-cph6","summary":"websocket-driver: Message corruption via abuse of protocol length headers","modified":"2026-09-10T03:51:12.671093404Z","packages":[{"ecosystem":"npm","name":"websocket-driver","purl":"pkg:npm/websocket-driver","ranges":["<0.7.5"],"fixed":["0.7.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}