High 7.5Published Mar 27, 2026

CVE-2026-33891Forge has Denial of Service via Infinite Loop in BigInteger.modInverse() with Zero Input

Updated under an hour ago (Oct 28, 2026, 11:00 AM ET)

Does this affect you?

It affects digitalbazaar forge and 13 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for digitalbazaar forge

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-835, CWE-606
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Sep 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

digitalbazaar forge digitalbazaar:forge (from the name)	before 1.4.0	CNA record
Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8 redhat:ansible_automation_platform	from 0:2.5.20260422-3.el8ap not affected	CISA ADP
Red Hat Cluster Observability Operator 1.5.0 redhat:cluster_observability_operator	from 1782839279 not affected	CISA ADP
Red Hat Red Hat Developer Hub 1.8 redhat:rhdh	from 1776784286 not affected	CISA ADP
Red Hat Cryostat 4 redhat:cryostat	4	CISA ADP
Red Hat Logging Subsystem for Red Hat OpenShift redhat:logging	5	CISA ADP
Red Hat Red Hat build of Apache Camel - HawtIO 4 redhat:apache_camel_hawtio	4	CISA ADP
Red Hat Red Hat build of Apicurio Registry 2 redhat:service_registry	2	CISA ADP
Red Hat Red Hat Build of Podman Desktop redhat:podman_desktop	1	CISA ADP
Red Hat Red Hat Data Grid 8 redhat:jboss_data_grid	8	CISA ADP
1–10 of 15

References

References

https://github.com/digitalbazaar/forge/security/advisories/GHSA-5m6q-g25r-mvwx	x-refsource-confirm, exploit, vendor-advisory
https://github.com/digitalbazaar/forge/commit/9bb8d67b99d17e4ebb5fd7596cd699e11f25d023	x-refsource-misc, patch
https://access.redhat.com/errata/RHSA-2026:13826
https://access.redhat.com/errata/RHSA-2026:24761
https://access.redhat.com/errata/RHSA-2026:24762
https://access.redhat.com/errata/RHSA-2026:34342
https://access.redhat.com/errata/RHSA-2026:9742
https://access.redhat.com/security/cve/CVE-2026-33891
https://bugzilla.redhat.com/show_bug.cgi?id=2452450
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33891.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.