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Malicious code in pxnpm (npm)

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 pxnpm

    Affected
    >= 7.0.0-beta.6, <= 7.0.0-beta.6>= 7.0.0-beta.8, <= 7.0.0-beta.8>= 7.0.0, <= 7.0.0>= 7.0.1, <= 7.0.1>= 7.0.2, <= 7.0.2
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

pxnpm 7.0.0-beta.6, 7.0.0-beta.8 and 7.0.0 (published 2026-10-06 by user nfjbill) are a 10-file, 16 KB launcher for a native executable that is not contained in the package. The postinstall script (bin/install.cjs) calls ensureNative() in dist/download.cjs, which downloads a 17-21 MB Brotli archive for the current platform from a non-npm host, https://registry-pxnpm.rdc.nfjbill.ren:20021/__static/srv/downloads/pxnpm/ / - .br, decompresses it into a 52-72 MB executable under ~/.cache/pxnpm/native/ / /, sets mode 0755, and the launcher (dist/launcher.cjs line 54) later runs it with child_process.spawn. The manifest (dist/native-manifest.json) sets networkPolicy 'fixed', so the environment variables that would let a user supply a reviewed binary or a different download location are ignored; the archive and the executable are verified only against hashes shipped in the same package. When run, dist/launcher.cjs prepare() deletes every registry and proxy setting from the user's environment…

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

    Published from osv record MAL-2026-17710

Agent brief

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

# Patch Next advisory brief: mal-2026-17710

Advisory: Malicious code in pxnpm (npm)
IDs: mal-2026-17710
Record: https://patchnext.com/advisories/mal-2026-17710 (revision 1, source checked 30 Oct 2026, 06:15 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 response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm pxnpm: affected >= 7.0.0-beta.6, <= 7.0.0-beta.6; >= 7.0.0-beta.8, <= 7.0.0-beta.8; >= 7.0.0, <= 7.0.0; >= 7.0.1, <= 7.0.1; >= 7.0.2, <= 7.0.2

## Suggested inspection (read-only)
- `npm ls pxnpm --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 pxnpm.
- 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/MAL-2026-17710 (OSV record MAL-2026-17710 lists affected ranges: npm pxnpm >=7.0.0-beta.6 =7.0.0-beta.8 =7.0.0 =7.0.1 =7.0.2 <=7.0.2)

Commands are suggestions: review each one before running it.

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