CVE-2026-119186 Forge: AES-GCM authentication bypass via unvalidated tagLength option
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-119186?
CVE-2026-119186 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, node-forge did not validate the AES-GCM tagLength option passed to start() during decryption through forge.cipher.createDecipher(). When an application derived tagLength from received data or used an unset or zero-like configuration value, a value that converted to zero together with an empty or missing authentication tag caused the calculated and supplied tags to compare as empty, so decipher.finish() accepted unauthenticated ciphertext. Applications that omit tagLength to use the 128-bit default or pass a fixed valid tag length are unaffected. This issue is fixed in version 1.4.1.
Which versions are affected by CVE-2026-119186?
How do I fix CVE-2026-119186?
No fix has been published for CVE-2026-119186 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-119186 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-119186 exists.