CVE-2026-119189

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CVE-2026-119189

Summary: Forge: X.509 pathLenConstraint not enforced by verifyCertificateChain() for CA certificates without keyUsage

Details: Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, node-forge enforced an X.509 CA certificate's basicConstraints.pathLenConstraint only when that certificate also carried a keyUsage extension. Exploitation requires a path-length-constrained CA without keyUsage that chains to a root trusted by the application, and an attacker who holds that CA's private key or obtains a subordinate CA certificate from it. The attacker could then construct a chain exceeding the declared path length that still passed pki.verifyCertificateChain(). Public web PKI CA certificates normally include keyUsage; private PKIs with CA certificates created without it are more likely to be affected. This issue is fixed in version 1.4.1.

References: https://github.com/digitalbazaar/forge/releases/tag/v1.4.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119189.json, https://github.com/digitalbazaar/forge/security/advisories/GHSA-h46v-rmh6-fq4f, https://nvd.nist.gov/vuln/detail/CVE-2026-119189, https://github.com/digitalbazaar/forge/commit/696db92348623e88cc63c35f0a89ede481d55ad0