---
id: CVE-2026-33891
title: >-
  Forge (also called `node-forge`) is a native implementation of Transport Layer
  Security in JavaScript
summary: >-
  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
  BigInt…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-835
  - CWE-606
vendor: digitalbazaar
product: forge
affected:
  - forge <= 1.3.3
published: '2026-03-27'
updated: '2026-07-02'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33891'
references:
  - url: >-
      https://github.com/digitalbazaar/forge/commit/9bb8d67b99d17e4ebb5fd7596cd699e11f25d023
    label: security-advisories@github.com
  - url: >-
      https://github.com/digitalbazaar/forge/security/advisories/GHSA-5m6q-g25r-mvwx
    label: security-advisories@github.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:13826'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:24761'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:24762'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:34342'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:9742'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-33891'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2452450'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33891.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-33891'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33891'
  - url: 'https://access.redhat.com/errata/RHSA-2026:86618'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00607
epssPercentile: 0.48804
ingestedAt: '2026-07-02T12:34:40.393Z'
patched:
  - ansible_automation_platform_2_5_for_rhel 8
  - ansible_automation_platform_2_5_for_rhel 9
  - ansible_automation_platform_2_6_for_rhel 9
  - cluster_observability_operator 1.5.3
  - developer_hub 1.8
  - developer_hub 1.9
---

## Overview

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.

## Affected

- `forge <= 1.3.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:24761** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9 · released 2026-06-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:24761)
- **RHSA-2026:24762** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.6 for RHEL 9 · released 2026-06-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:24762)
- **RHSA-2026:34342** · Red Hat · fixed in: Cluster Observability Operator 1.5.3 · released 2026-07-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:34342)
- **RHSA-2026:9742** · Red Hat · fixed in: Red Hat Developer Hub 1.8 · released 2026-04-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:9742)
- **RHSA-2026:13826** · Red Hat · fixed in: Red Hat Developer Hub 1.9 · released 2026-05-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:13826)
- **Red Hat VEX** · Important · affected: Logging Subsystem for Red Hat OpenShift, Red Hat build of Apicurio Registry 2, Red Hat Build of Podman Desktop, Red Hat Enterprise Linux 10, Red Hat Fuse 7 · no fix planned: Logging Subsystem for Red Hat OpenShift, Red Hat Fuse 7, Red Hat build of Apicurio Registry 2, Red Hat Build of Podman Desktop, … · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33891.json)
- **RHSA-2026:86618** · Red Hat · fixed in: Red Hat Ceph Storage 9.2 · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:86618)