## Node-Forge 1.4.0 Patches Critical DoS Flaw in `BigInteger.modInverse()` (CVE-2026-33891)
The node-forge cryptography library has released version 1.4.0 to patch a high-severity Denial of Service (DoS) vulnerability. The flaw, tracked as CVE-2026-33891, resides in the `BigInteger.modInverse()` function, which is inherited from the bundled jsbn library. When this function is called with a zero value as input, it triggers an infinite loop within the Extended Euclidean Algorithm. This creates an unreachable exit condition, causing the Node.js process to hang indefinitely and consume 100% of CPU resources, rendering the application unresponsive.

The vulnerability was reported by a researcher known as Kr0emer and has been assigned a GHSA advisory identifier. The issue is classified as a HIGH severity security risk due to its potential for complete service disruption. The patch in version 1.4.0 resolves the logic flaw, preventing the infinite loop condition. Node-forge is a widely used library for implementing cryptographic functions in JavaScript, making this update critical for any project that depends on it for tasks like TLS, SSH, or digital signatures.

Developers and security teams must prioritize upgrading from node-forge versions 1.3.2 and earlier to 1.4.0 or later. Failure to apply this patch leaves applications vulnerable to a trivial DoS attack where an adversary can trigger the infinite loop with a specific input. This vulnerability underscores the persistent risks in foundational cryptographic dependencies and the importance of proactive dependency management in the software supply chain.
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- **Source**: GitHub Issues
- **Sector**: The Lab
- **Tags**: cybersecurity, vulnerability, nodejs, cryptography, CVE-2026-33891
- **Credibility**: unverified
- **Published**: 2026-03-27 02:27:07
- **ID**: 36583
- **URL**: https://whisperx.ai/en/intel/36583