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Node.js made calls to EntropySource() in SecretKeyGenTraits::DoKeyGen() in src/crypto/crypto_keygen.cc. However, it does not check the return value, it assumes EntropySource() always succeeds, but…

CVE-2022-35255

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (node 18.9.1), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • runtime node

    Affected
    >= 18.0.0, < 18.9.1
    Fixed in
    18.9.1

Sources

  • nodejs.org runtime security intelligence

    The nodejs.org release index dates the first patched release for CVE-2022-35255 to 2022-09-23.

    VerifiedObserved Official nodejs.org release index (dist/index.json).

  • raw.githubusercontent.com runtime security intelligence

    Node.js security working group core entry 101 lists CVE-2022-35255 affecting node >=18.0.0 <18.9.1

    VerifiedObserved Structured Node.js security-wg core vulnerability record maintained by the Node.js project.

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
  • CVE-2022-35255: 2.09% estimated exploitation activity in the next 30 days; percentile 81.64 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Node.js made calls to EntropySource() in SecretKeyGenTraits::DoKeyGen() in src/crypto/crypto_keygen.cc. However, it does not check the return value, it assumes EntropySource() always succeeds, but it can (and sometimes will) fail.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · published ·

    Published from vendor_advisory record nodejs-security-wg:core:101

  2. Revision 1 · created ·

    Created from vendor_advisory record nodejs-security-wg:core:101

Agent brief

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# Patch Next advisory brief: CVE-2022-35255

Advisory: Node.js made calls to EntropySource() in SecretKeyGenTraits::DoKeyGen() in src/crypto/crypto_keygen.cc. However, it does not check the return value, it assumes EntropySource() always succeeds, but…
IDs: CVE-2022-35255
Record: https://patchnext.com/advisories/cve-2022-35255 (revision 2, source checked 26 Oct 2026, 16:35 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: node 18.9.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- runtime node: affected >= 18.0.0, < 18.9.1; fixed in 18.9.1

## Suggested inspection (read-only)
- runtime node: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on node.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://nodejs.org/dist/index.json (The nodejs.org release index dates the first patched release for CVE-2022-35255 to 2022-09-23.)
- Verified: https://raw.githubusercontent.com/nodejs/security-wg/main/vuln/core/101.json (Node.js security working group core entry 101 lists CVE-2022-35255 affecting node >=18.0.0 <18.9.1)

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