Vulnerabilities CVE-2026-33891

CVE-2026-33891

High

Open

TLP:CLEAR

Forge has Denial of Service via Infinite Loop in BigInteger.modInverse() with Zero Input

NVD CVE.org

DDoS

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Description

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, a Denial of Service (DoS) vulnerability exists in the node-forge library due to an infinite loop in the BigInteger.modInverse() function (inherited from the bundled jsbn library). When modInverse() is called with a zero value as input, the internal Extended Euclidean Algorithm enters an unreachable exit condition, causing the process to hang indefinitely and consume 100% CPU. Version 1.4.0 patches the issue.

Details

CVSS Score: 7.5
EPSS Score ⓘ: 0.60%

45.5th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence: 90%
Published: Mar 27, 2026
Last Modified: Jul 15, 2026

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