# happy-dom (npm) vulnerabilities Source: https://junglewise.ai/threats/technologies/happy-dom Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/happy-dom.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 8 vulnerabilities in happy-dom (npm): 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-118661, was published on 28 October 2026. 3 vulnerabilities in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 3 - Last 90 days: 3 - All time: 8 (0 critical, 0 exploited in the wild) ## About happy-dom (npm) JavaScript implementation of the DOM for server-side rendering and testing. ## Latest happy-dom (npm) vulnerabilities - [CVE-2026-118661: Happy DOM cookie scope forgery in CookieContainer](https://junglewise.ai/threats/cve-2026-118661-happy-dom-is-a-javascript-implementation-of-a-web-browser) (medium, CVSS 6.5, published 28 Oct 2026) - [CVE-2026-118660: Happy DOM server-side request forgery via iframe and CSS loading](https://junglewise.ai/threats/cve-2026-118660-happy-dom-is-a-javascript-implementation-of-a-web-browser) (high, CVSS 8.6, published 28 Oct 2026) - [CVE-2026-115895: Happy DOM code injection in ESM compiler](https://junglewise.ai/threats/cve-2026-115895-happy-dom-is-a-javascript-implementation-of-a-web-browser) (high, CVSS 8.8, published 23 Oct 2026) - [CVE-2026-34226: capricorn86 Happy DOM cookie leakage in fetch requests](https://junglewise.ai/threats/cve-2026-34226-capricorn86-happy-dom-cookie-leakage-in-fetch-requests) (high, CVSS 7.5, published 27 Mar 2026) - [CVE-2026-33943: capricorn86 Happy DOM code injection in ECMAScriptModuleCompiler](https://junglewise.ai/threats/cve-2026-33943-capricorn86-happy-dom-code-injection-in-ecmascriptmodulecompiler) (high, CVSS 8.8, published 27 Mar 2026) - [CVE-2025-62410: happy-dom prototype pollution allowing arbitrary code execution](https://junglewise.ai/threats/cve-2025-62410-happy-dom-prototype-pollution-allowing-arbitrary-code-execution) (medium, CVSS 4, published 15 Oct 2025) - [CVE-2025-61927: Happy DOM VM Context Escape leading to Remote Code Execution](https://junglewise.ai/threats/cve-2025-61927-happy-dom-vm-context-escape-leading-to-remote-code-execution) (medium, CVSS 4, published 10 Oct 2025) - [CVE-2024-51757: happy-dom server-side code execution via script tag](https://junglewise.ai/threats/cve-2024-51757-happy-dom-server-side-code-execution-via-script-tag) (medium, CVSS 4, published 6 Nov 2024) ## Most severe happy-dom (npm) vulnerabilities - [CVE-2026-33943: capricorn86 Happy DOM code injection in ECMAScriptModuleCompiler](https://junglewise.ai/threats/cve-2026-33943-capricorn86-happy-dom-code-injection-in-ecmascriptmodulecompiler) (high, CVSS 8.8, published 27 Mar 2026) - [CVE-2026-115895: Happy DOM code injection in ESM compiler](https://junglewise.ai/threats/cve-2026-115895-happy-dom-is-a-javascript-implementation-of-a-web-browser) (high, CVSS 8.8, published 23 Oct 2026) - [CVE-2026-118660: Happy DOM server-side request forgery via iframe and CSS loading](https://junglewise.ai/threats/cve-2026-118660-happy-dom-is-a-javascript-implementation-of-a-web-browser) (high, CVSS 8.6, published 28 Oct 2026) - [CVE-2026-34226: capricorn86 Happy DOM cookie leakage in fetch requests](https://junglewise.ai/threats/cve-2026-34226-capricorn86-happy-dom-cookie-leakage-in-fetch-requests) (high, CVSS 7.5, published 27 Mar 2026) - [CVE-2026-118661: Happy DOM cookie scope forgery in CookieContainer](https://junglewise.ai/threats/cve-2026-118661-happy-dom-is-a-javascript-implementation-of-a-web-browser) (medium, CVSS 6.5, published 28 Oct 2026) - [CVE-2024-51757: happy-dom server-side code execution via script tag](https://junglewise.ai/threats/cve-2024-51757-happy-dom-server-side-code-execution-via-script-tag) (medium, CVSS 4, published 6 Nov 2024) - [CVE-2025-61927: Happy DOM VM Context Escape leading to Remote Code Execution](https://junglewise.ai/threats/cve-2025-61927-happy-dom-vm-context-escape-leading-to-remote-code-execution) (medium, CVSS 4, published 10 Oct 2025) - [CVE-2025-62410: happy-dom prototype pollution allowing arbitrary code execution](https://junglewise.ai/threats/cve-2025-62410-happy-dom-prototype-pollution-allowing-arbitrary-code-execution) (medium, CVSS 4, published 15 Oct 2025) ## Vulnerabilities per week 3 vulnerabilities in the last four weeks, up from none in the four before. | 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 | 1 | 0 | 0 | | 26 Oct 2026 | 2 | 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, "happy-dom (npm) vulnerabilities", https://junglewise.ai/threats/technologies/happy-dom, 13 November 2026.