CVE-2026-118774: Forge: Certificate signature verified with the issuer's RSA signature scheme

CVE-2026-118774 · 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, the affected implementation used certificate.verify(child), _verifySignature(), lib/x509.js to process the relevant input or security decision. node-forge selected RSA padding and RSASSA-PSS parameters from the issuer certificate rather than the child certificate being verified. A child labeled as RSASSA-PSS could therefore be accepted with a PKCS#1 v1.5 signature when the issuer used PKCS#1 v1.5. The signature still had to be produced with the trusted issuer's private key, so this did not permit certificate identity forgery, but it could bypass policies that require a declared signature scheme. This issue is fixed in version 1.4.1.

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

Quick answers

Is CVE-2026-118774 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-118774 being exploited in the wild.
How severe is CVE-2026-118774?
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-2026-118774?
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-2026-118774?
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-2026-118774
  • GHSA-9wg5-mj3p-v49q

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