Vulnerability Description
Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used BigInteger.prototype.modInverse(), bnModInverse(), lib/jsbn.js, RSA public exponent e to process the relevant input or security decision. node-forge's bundled jsbn implementation entered an infinite loop when BigInteger.prototype.modInverse() received a negative value or modulus. An attacker who could control the RSA public exponent passed to key generation, or a direct modInverse() operand, could block the Node.js event loop at full CPU. Parsed DER, PEM, JWK, PKCS#12, X.509, and TLS values are unsigned and cannot trigger this issue. This issue is fixed in version 1.4.1.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/digitalbazaar/forge/commit/e96c47b7f006dec66fb7bb1934e7375498
- https://github.com/digitalbazaar/forge/releases/tag/v1.4.1
- https://github.com/digitalbazaar/forge/security/advisories/GHSA-h6cr-wjv9-3cpp
FAQ
What is CVE-2026-118781?
CVE-2026-118781 is a vulnerability with a CVSS score of 2.9 (LOW). Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used BigInteger.prototype.modInverse(), bnModInverse(),...
How severe is CVE-2026-118781?
CVE-2026-118781 has been rated LOW with a CVSS base score of 2.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-118781?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.