DigitalBazaar forge up to 1.4.2 X.509 Validation lib/x509.js pki.verifyCertificateChain certificate validation

Summaryinfo

A vulnerability classified as problematic was found in DigitalBazaar forge up to 1.4.2. This issue affects the function pki.verifyCertificateChain of the file lib/x509.js of the component X.509 Validation. The manipulation results in certificate validation. This vulnerability is identified as CVE-2026-125336. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in DigitalBazaar forge up to 1.4.2. Affected is the function pki.verifyCertificateChain of the file lib/x509.js of the component X.509 Validation. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on integrity. CVE summarizes:

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.3, pki.verifyCertificateChain() in lib/x509.js does not decode or enforce the X.509 nameConstraints extension while validating certificate paths. A name-constrained certificate authority with a non-critical extension can therefore issue a leaf certificate with a subjectAltName dNSName or subject commonName outside a permitted subtree or inside an excluded subtree, and node-forge accepts the chain. Exploitation requires a name-constrained CA that chains to a trusted root and either its private key or the ability to obtain an out-of-scope certificate, allowing impersonation of names outside the delegated namespace, including against forge.tls clients. Chains without nameConstraints are not affected, and affected versions safely reject critical nameConstraints as unsupported rather than accepting them. This issue is fixed in version 1.4.3.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-125336 since 11/09/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1587.003.

Upgrading to version 1.4.3 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• DigitalBazaar

Name

• forge

Version

• 1.4.0
• 1.4.1
• 1.4.2

Website

• Product: https://github.com/digitalbazaar/forge/

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