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.
Affected products
digitalbazaar: forge
References10
- github.com/digitalbazaar/forge/security/advisories/GHSA-5m6q-g2… ExploitVendor Advisory
- github.com/digitalbazaar/forge/commit/9bb8d67b99d17e4ebb5fd7596… Patch
- access.redhat.com/errata/RHSA-2026:13826
- access.redhat.com/errata/RHSA-2026:24761
- access.redhat.com/errata/RHSA-2026:24762
- access.redhat.com/errata/RHSA-2026:34342
- access.redhat.com/errata/RHSA-2026:9742
- access.redhat.com/security/cve/CVE-2026-33891
- bugzilla.redhat.com/show_bug.cgi?id=2452450
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33891…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 50 · as of 12 November 2026
- CWE
- CWE-835CWE-606
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