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Critical, CVSS 9.8amended

Malicious Package in portionfatty12

GHSA-p8fm-w787-x6x3

What to do

Vendor response not established. 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 portionfatty12

    Affected
    every version
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

All versions of portionfatty12 are considered malicious. The package is malware designed to steal user's data. When installed it uploads the user's public SSH keys to a remote server. Recommendation This package is not available on the npm Registry anymore. If you happen to find this package in your environment you should consider the system it was installed on compromised and assess if further response (such as rotating all credentials found on the compromised machine) is necessary.

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

    Amended from ghsa record GHSA-p8fm-w787-x6x3

  2. Revision 1 · created ·

    Published from osv record GHSA-p8fm-w787-x6x3

Agent brief

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

# Patch Next advisory brief: GHSA-p8fm-w787-x6x3

Advisory: Malicious Package in portionfatty12
IDs: GHSA-p8fm-w787-x6x3
Record: https://patchnext.com/advisories/ghsa-p8fm-w787-x6x3 (revision 2, source checked 26 Oct 2026, 12:09 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm portionfatty12: affected every version

## Suggested inspection (read-only)
- `npm ls portionfatty12 --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 portionfatty12.
- 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-p8fm-w787-x6x3 (OSV record GHSA-p8fm-w787-x6x3 lists affected ranges: npm portionfatty12 >=0.0.0)
- Verified: https://github.com/advisories/GHSA-p8fm-w787-x6x3 (GitHub-reviewed advisory GHSA-p8fm-w787-x6x3 lists affected ranges: npm portionfatty12 >=0.0.0)

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