{"cve":"CVE-2026-48779","nvd":{"published":"2026-06-17T13:20:42.887","modified":"2026-10-26T12:10:00.130","status":"Modified","description":"ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400","CWE-770","CWE-1050"],"references":["https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7","https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53","https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94","https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8","https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p"],"products":["ws_project:ws"],"source":"nvd","synced_at":"2026-10-26T12:35:18.182177120+00:00"},"epss":{"cve":"CVE-2026-48779","score":0.00812,"percentile":0.56696,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-96hv-2xvq-fx4p","url":"https://osv.dev/vulnerability/GHSA-96hv-2xvq-fx4p","summary":"ws: Memory exhaustion DoS from tiny fragments and data chunks","modified":"2026-09-10T03:50:49.163643932Z","packages":[{"ecosystem":"npm","name":"ws","purl":"pkg:npm/ws","ranges":[">=1.1.0 <5.2.5"],"fixed":["5.2.5"]},{"ecosystem":"npm","name":"ws","purl":"pkg:npm/ws","ranges":[">=6.0.0 <6.2.4"],"fixed":["6.2.4"]},{"ecosystem":"npm","name":"ws","purl":"pkg:npm/ws","ranges":[">=7.0.0 <7.5.11"],"fixed":["7.5.11"]},{"ecosystem":"npm","name":"ws","purl":"pkg:npm/ws","ranges":[">=8.0.0 <8.21.0"],"fixed":["8.21.0"]}]}],"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."]}