{"id":"CVE-2026-45736","summary":"ws: Uninitialized memory disclosure","details":"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.","aliases":["GHSA-58qx-3vcg-4xpx"],"modified":"2026-06-18T03:57:39.235608164Z","published":"2026-05-15T14:53:57.263Z","related":["CGA-342g-4fmm-4xmf"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45736.json","cwe_ids":["CWE-908"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45736.json"},{"type":"ADVISORY","url":"https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45736"},{"type":"FIX","url":"https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/websockets/ws","events":[{"introduced":"fc4024898c0da9b587c50a4a2d02d3ff88cddf06"},{"fixed":"5d9b316230ea931532a6671cc450f18c11edd02f"},{"fixed":"c0327ec15a54d701eb6ccefaa8bef328cfc03086"}],"database_specific":{"cpe":"cpe:2.3:a:ws_project:ws:*:*:*:*:*:node.js:*:*","extracted_events":[{"introduced":"8.0.0"},{"fixed":"8.20.1"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["8.20.0","8.19.0","8.18.3","8.18.2","8.18.1","8.18.0","8.17.1","8.17.0","8.16.0","8.15.1","8.15.0","8.14.2","8.14.1","8.14.0","8.13.0","8.12.1","8.12.0","8.11.0","8.10.0","8.9.0","8.8.1","8.8.0","8.7.0","8.6.0","8.5.0","8.4.2","8.4.1","8.4.0","8.3.0","8.2.3","8.2.2","8.2.1","8.2.0","8.1.0","8.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-45736.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N"}]}