CVE-2026-118777 Forge: Prototype Pollution in forge.http cookie handling via a malicious Set-Cookie
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-118777?
CVE-2026-118777 is a medium-severity vulnerability in digitalbazaar forge, published on 29 Oct 2026.
Official description
Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the forge.http client stored cookie names and paths from Set-Cookie response headers in ordinary JavaScript objects. A malicious server could use the cookie name __proto__ so that the attacker-controlled cookie path was written as a property on Object.prototype, or use inherited names such as constructor to modify Object. An empty cookie value could use the removal path to delete an inherited Object.prototype property. Applications using forge.http directly or through forge.xhr are affected; applications that do not use forge.http are unaffected. This issue is fixed in version 1.4.1.
Weakness: CWE-1321
Which versions are affected by CVE-2026-118777?
How do I fix CVE-2026-118777?
No fix has been published for CVE-2026-118777 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-118777 being exploited?
There is no known exploitation of CVE-2026-118777 in the wild and no public exploit code.