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High, CVSS 8.1amended

hoek subject to prototype pollution via the clone function.

CVE-2020-36604GHSA-c429-5p7v-vgjp

What to do

Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.

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

  • npm hoek

    Affected
    <= 6.1.3
    Fixed in
    no fixed version recorded

  • npm @hapi/hoek

    Affected
    < 8.5.1>= 9.0.0, < 9.0.3
    Fixed in
    9.0.3, 8.5.1

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
  • CVE-2020-36604: 1.24% estimated exploitation activity in the next 30 days; percentile 69.22 (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.

hoek versions prior to 8.5.1, and 9.x prior to 9.0.3 are vulnerable to prototype pollution in the clone function. If an object with the proto key is passed to clone() the key is converted to a prototype. This issue has been patched in version 9.0.3, and backported to 8.5.1.

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

    Amended from ghsa record GHSA-c429-5p7v-vgjp

  2. Revision 1 · created ·

    Published from osv record GHSA-c429-5p7v-vgjp

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2020-36604

Advisory: hoek subject to prototype pollution via the clone function.
IDs: CVE-2020-36604, GHSA-c429-5p7v-vgjp
Record: https://patchnext.com/advisories/cve-2020-36604 (revision 2, source checked 26 Oct 2026, 12:37 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: @hapi/hoek 9.0.3, 8.5.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm hoek: affected <= 6.1.3
- npm @hapi/hoek: affected < 8.5.1; >= 9.0.0, < 9.0.3; fixed in 9.0.3, 8.5.1

## Suggested inspection (read-only)
- `npm ls hoek --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.
- `npm ls @hapi/hoek --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on hoek, @hapi/hoek.
- 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://osv.dev/vulnerability/GHSA-c429-5p7v-vgjp (OSV record GHSA-c429-5p7v-vgjp lists affected ranges: npm @hapi/hoek >=0 =9.0.0 =0 <=6.1.3)
- Verified: https://github.com/advisories/GHSA-c429-5p7v-vgjp (GitHub-reviewed advisory GHSA-c429-5p7v-vgjp lists affected ranges: npm @hapi/hoek >=0 =9.0.0 =0 <=6.1.3)

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