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.

Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-5m6q-g25r-mvwx Forge has Denial of Service via Infinite Loop in BigInteger.modInverse() with Zero Input
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 28 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-606
References
Metrics threat_severity

None

threat_severity

Important


Sat, 28 Mar 2026 03:15:00 +0000

Type Values Removed Values Added
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.
Title Forge has Denial of Service via Infinite Loop in BigInteger.modInverse() with Zero Input
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-27T20:43:37.725Z

Reserved: 2026-03-24T15:10:05.682Z

Link: CVE-2026-33891

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-27T21:17:25.817

Modified: 2026-03-27T21:17:25.817

Link: CVE-2026-33891

cve-icon Redhat

Severity : Important

Publid Date: 2026-03-27T20:43:37Z

Links: CVE-2026-33891 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses