CVE-2026-118775: Forge: ASN.1 OID first arc truncation in asn1.oidToDer

CVE-2026-118775 · Severity: low · CVSS 3.7 · Published 2026-10-29

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, asn1.oidToDer() in lib/asn1.js did not range-check the first two arcs of an OID. An application that accepted an untrusted OID string, checked or authorized that string, and then encoded it with asn1.oidToDer() could emit DER representing a different, trusted OID from the one that was checked. DER parsing is not affected. This issue is fixed in version 1.4.1.

Technologies: node-forge (npm). Vendors: npm.

Quick answers

Is CVE-2026-118775 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-118775 being exploited in the wild.
How severe is CVE-2026-118775?
Low severity, with a CVSS score of 3.7, published 29 October 2026.
Which products and versions are affected?
node-forge (npm) <= 1.4.0, SEMVER:introduced=0,fixed=1.4.1.
Is there a fix for CVE-2026-118775?
Yes. node-forge (npm): upgrade to 1.4.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-118775?
Check whether you run node-forge (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • node-forge (npm): upgrade to 1.4.1 or later
    npm install node-forge@1.4.1

Affected products

  • node-forge (npm) <= 1.4.0, SEMVER:introduced=0,fixed=1.4.1

Identifiers

  • CVE-2026-118775
  • GHSA-4642-5mcj-2rqw

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