[ CVE-2026-118782 · Published 29 Oct 2026 ]
Forge: PKCS#12 MAC forgery and constant-key PBE via zero iteration count
[ Why it matters ]Priority signals
- Public proof-of-concept exploit exists (CISA SSVC)
[ Description ]Official description
Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, node-forge accepted a PKCS#12 MAC or PKCS#12 password-based encryption iteration count of zero or less. pki.pbe.generatePkcs12Key() then returned a constant key independent of the password and salt, allowing crafted PKCS#12 input processed by forge.pkcs12.pkcs12FromAsn1() to bypass password-based integrity checks. Predictable encryption keys and IVs also affected PKCS#12 PBE using pbeWithSHAAnd3-KeyTripleDES-CBC or pbewithSHAAnd40BitRC2-CBC, including shrouded key bags, encrypted SafeContents, and PKCS#8 ENCRYPTED PRIVATE KEY input processed independently by forge.pki.decryptPrivateKeyInfo(). PBES2/PBKDF2-encrypted content is unaffected. This issue is fixed in version 1.4.1.
[ Fixes ]Fixes and patches
- node-forge 1.4.1Fixed version · GitHub Advisories · npm package node-forge: upgrade to 1.4.1 or later (affected <= 1.4.0)
[ Packages ]Affected open-source packages
- node-forge npmAffected <= 1.4.0 · fixed in 1.4.1 · GHSA-jc66-7q78-782g