{"cve":"CVE-2026-45736","nvd":{"published":"2026-05-15T15:16:54.103","modified":"2026-10-26T14:10:00.130","status":"Modified","description":"ws is an open source WebSocket client and server for Node.js. Prior to 8.20.1, the websocket.close() implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. This vulnerability is fixed in 8.20.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-908","CWE-824"],"references":["https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086","https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx","https://access.redhat.com/errata/RHSA-2026:26638","https://access.redhat.com/errata/RHSA-2026:26994","https://access.redhat.com/errata/RHSA-2026:27171"],"products":["ws_project:ws"],"source":"nvd","synced_at":"2026-10-26T14:27:29.784594657+00:00"},"epss":{"cve":"CVE-2026-45736","score":0.00745,"percentile":0.54509,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-58qx-3vcg-4xpx","url":"https://osv.dev/vulnerability/GHSA-58qx-3vcg-4xpx","summary":"ws: Uninitialized memory disclosure","modified":"2026-09-10T03:51:04.572514669Z","packages":[{"ecosystem":"npm","name":"ws","purl":"pkg:npm/ws","ranges":[">=8.0.0 <8.20.1"],"fixed":["8.20.1"]}]}],"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."]}