6.5
Medium
CVE-2026-118661 Happy DOM is a JavaScript implementation of a web browser without its graphical user interface
Description
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 20.14.6, Happy DOM's CookieContainer in src/cookie/CookieContainer.ts does not correctly validate or match Domain cookie attributes. It can accept a Domain unrelated to the origin setting the cookie, including a public suffix, and separately treats an unrelated suffix-sharing hostname as a match because cookieMatchesURL does not enforce a DNS-label boundary. In server-side rendering and prerendering applications that contact attacker-controlled origins and then make requests to a victim origin, these behaviors can plant and deliver a forged cookie, enabling cookie injection or session fixation. This issue is fixed in version 20.14.6.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| happy-dom 20.14 | earliest → < 20.14.6 | 20.14.6 |
References
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of happy-dom
The 9 CVEs of happy-dom →
CVE-2026-118660
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CVE-2026-115895
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CVE-2026-34226
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