CVE-2026-33891: digitalbazaar forge · Infinite Loop
Affects digitalbazaar forgeSource CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 1.4.0 soon.
Data as of 29 Oct 2026, 19:04 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.4.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 27 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade forge and digitalbazaar/forge to 1.4.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| digitalbazaarforge | Affected
| Fixed in
|
npmdigitalbazaar/forgepkg:npm/digitalbazaar/forgeOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade to node-forge version 1.4.0 or later, where this infinite loop vulnerability in BigInteger.modInverse() has been fixed. Red Hat has issued security advisories and updates for their affected products incorporating this fix. Applying these official patches or updates will remediate the issue.
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.
References
- github.com/digitalbazaar/forge/security/advisories/GHSA-5m6q-g25r-mvwx (opens in a new tab)
- github.com/digitalbazaar/forge/commit/9bb8d67b99d17e4ebb5fd7596cd699e11f25d023 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-33891 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2452450 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33891.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24761 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24762 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:34342 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:9742 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:13826 (opens in a new tab)