# ws (npm) vulnerabilities Source: https://junglewise.ai/threats/technologies/ws Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/ws.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 8 vulnerabilities in ws (npm): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-62389, was published on 15 July 2026. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 8 (0 critical, 0 exploited in the wild) ## About ws (npm) WebSocket implementation for Node.js with support for the WebSocket protocol. ## Latest ws (npm) vulnerabilities - [CVE-2026-62389: websockets ws memory exhaustion in lib/receiver.js](https://junglewise.ai/threats/cve-2026-62389-websockets-ws-memory-exhaustion-in-lib-receiver-js) (high, CVSS 7.5, published 15 Jul 2026) - [CVE-2026-48779: websockets ws memory exhaustion DoS via small fragments](https://junglewise.ai/threats/cve-2026-48779-websockets-ws-memory-exhaustion-dos-via-small-fragments) (high, CVSS 7.5, published 17 Jun 2026) - [CVE-2026-45736: websockets ws uninitialized memory disclosure in websocket.close](https://junglewise.ai/threats/cve-2026-45736-websockets-ws-uninitialized-memory-disclosure-in-websocket-close) (medium, CVSS 4.4, published 15 May 2026) - [CVE-2024-37890: websockets ws denial of service via excessive HTTP headers](https://junglewise.ai/threats/cve-2024-37890-websockets-ws-denial-of-service-via-excessive-http-headers) (high, CVSS 7.5, published 17 Jun 2024) - [CVE-2021-32640: ws ReDoS vulnerability in Sec-Websocket-Protocol header parsing](https://junglewise.ai/threats/cve-2021-32640-ws-redos-vulnerability-in-sec-websocket-protocol-header-parsing) (low, CVSS 3.1, published 28 May 2021) - [ws WebSocket denial of service in Sec-WebSocket-Extensions parsing](https://junglewise.ai/threats/ws-websocket-denial-of-service-in-sec-websocket-extensions-parsing-199b7f5b) (low, CVSS 3.1, published 4 Jun 2019) - [CVE-2016-10542: ws excessive websocket payload denial of service](https://junglewise.ai/threats/cve-2016-10542-ws-excessive-websocket-payload-denial-of-service) (info, CVSS 7.5, published 18 Feb 2019) - [CVE-2016-10518: websockets ws remote memory disclosure via uninitialized buffers](https://junglewise.ai/threats/cve-2016-10518-websockets-ws-remote-memory-disclosure-via-uninitialized-buffers) (info, CVSS 7.5, published 18 Feb 2019) ## Most severe ws (npm) vulnerabilities - [CVE-2026-48779: websockets ws memory exhaustion DoS via small fragments](https://junglewise.ai/threats/cve-2026-48779-websockets-ws-memory-exhaustion-dos-via-small-fragments) (high, CVSS 7.5, published 17 Jun 2026) - [CVE-2026-62389: websockets ws memory exhaustion in lib/receiver.js](https://junglewise.ai/threats/cve-2026-62389-websockets-ws-memory-exhaustion-in-lib-receiver-js) (high, CVSS 7.5, published 15 Jul 2026) - [CVE-2024-37890: websockets ws denial of service via excessive HTTP headers](https://junglewise.ai/threats/cve-2024-37890-websockets-ws-denial-of-service-via-excessive-http-headers) (high, CVSS 7.5, published 17 Jun 2024) - [CVE-2026-45736: websockets ws uninitialized memory disclosure in websocket.close](https://junglewise.ai/threats/cve-2026-45736-websockets-ws-uninitialized-memory-disclosure-in-websocket-close) (medium, CVSS 4.4, published 15 May 2026) - [CVE-2021-32640: ws ReDoS vulnerability in Sec-Websocket-Protocol header parsing](https://junglewise.ai/threats/cve-2021-32640-ws-redos-vulnerability-in-sec-websocket-protocol-header-parsing) (low, CVSS 3.1, published 28 May 2021) - [ws WebSocket denial of service in Sec-WebSocket-Extensions parsing](https://junglewise.ai/threats/ws-websocket-denial-of-service-in-sec-websocket-extensions-parsing-199b7f5b) (low, CVSS 3.1, published 4 Jun 2019) - [CVE-2016-10542: ws excessive websocket payload denial of service](https://junglewise.ai/threats/cve-2016-10542-ws-excessive-websocket-payload-denial-of-service) (info, CVSS 7.5, published 18 Feb 2019) - [CVE-2016-10518: websockets ws remote memory disclosure via uninitialized buffers](https://junglewise.ai/threats/cve-2016-10518-websockets-ws-remote-memory-disclosure-via-uninitialized-buffers) (info, CVSS 7.5, published 18 Feb 2019) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other npm technologies - [openclaw (npm)](https://junglewise.ai/threats/technologies/npm-openclaw): 214 vulnerabilities - [flowise (npm)](https://junglewise.ai/threats/technologies/flowise): 133 vulnerabilities - [parse-server (npm)](https://junglewise.ai/threats/technologies/parse-server): 117 vulnerabilities - [vm2 (npm)](https://junglewise.ai/threats/technologies/vm2): 111 vulnerabilities - [electron (npm)](https://junglewise.ai/threats/technologies/electron): 77 vulnerabilities - [ghost (npm)](https://junglewise.ai/threats/technologies/ghost): 74 vulnerabilities - [n8n (npm)](https://junglewise.ai/threats/technologies/npm-n8n): 64 vulnerabilities - [hono (npm)](https://junglewise.ai/threats/technologies/hono): 62 vulnerabilities - [directus (npm)](https://junglewise.ai/threats/technologies/directus): 61 vulnerabilities - [nocodb (npm)](https://junglewise.ai/threats/technologies/nocodb): 54 vulnerabilities - [undici (npm)](https://junglewise.ai/threats/technologies/undici): 53 vulnerabilities - [@budibase/server (npm)](https://junglewise.ai/threats/technologies/budibase-server): 42 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "ws (npm) vulnerabilities", https://junglewise.ai/threats/technologies/ws, 13 November 2026.