CVE-2026-33896 Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)

Forge also called node-forge is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, pki.verifyCertificateChain does not enforce RFC 5280 basicConstraints requirements when an intermediate certificate lacks both the basicConstraints and keyUsage extensions...

CVE-2026-33896 Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)

Forge also called node-forge is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, pki.verifyCertificateChain does not enforce RFC 5280 basicConstraints requirements when an intermediate certificate lacks both the basicConstraints and keyUsage extensions...

Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)

Summary pki.verifyCertificateChain does not enforce RFC 5280 basicConstraints requirements when an intermediate certificate lacks both the basicConstraints and keyUsage extensions. This allows any leaf certificate without these extensions to act as a CA and sign other certificates, which node-for...