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I. Basic Information for CVE-2026-33896
Vulnerability Information

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Vulnerability Title
Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)
Source: NVD (National Vulnerability Database)
Vulnerability Description
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. This allows any leaf certificate (without these extensions) to act as a CA and sign other certificates, which node-forge will accept as valid. Version 1.4.0 patches the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Digital Bazaar Forge 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Digital Bazaar Forge是美国Digital Bazaar公司的一个 Tls 在 Javascript 中的本机实现以及用于编写基于加密和网络密集型 Web 应用程序的开源工具。 Digital Bazaar Forge 1.4.0之前版本存在信任管理问题漏洞,该漏洞源于pki.verifyCertificateChain函数在中间证书缺少basicConstraints和keyUsage扩展时未强制执行RFC 5280基本约束要求,可能导致任何叶证书充当CA并签署其他证书。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
digitalbazaarforge < 1.4.0 -
II. Public POCs for CVE-2026-33896
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III. Intelligence Information for CVE-2026-33896
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IV. Related Vulnerabilities
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