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Unratedamended

Malicious code in b20miner (npm)

GHSA-fw7x-6chc-4244

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 b20miner

    Affected
    >= 0.3.1, <= 0.3.1
    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.

--- _-= Per source details. Do not edit below this line.=-_

Source: amazon-inspector (4987b21d454aad64b26fee42ee36d0d0e2a8b733dc23afbd0c7fe9bb3cd9e631) No install-time execution, credential access, network exfiltration, dropper behavior, or backdoor mechanism was observed in this package version. No lifecycle scripts fetching remote content, no reads of installer-side secret paths (~/.aws, ~/.ssh, ~/.npmrc, browser stores), and no hardcoded attacker-controlled network destinations were identified.

Source: ghsa-malware (6d1526b3a34c5de37870045aff69b54eb4d28fd5d1dbfe04fe23c5e1d654bdc3) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting…

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

    Amended from osv record MAL-2026-18365

  2. Revision 1 · created ·

    Published from osv record MAL-2026-18365

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-fw7x-6chc-4244

Advisory: Malicious code in b20miner (npm)
IDs: GHSA-fw7x-6chc-4244
Record: https://patchnext.com/advisories/mal-2026-18365 (revision 2, source checked 30 Oct 2026, 06:05 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 b20miner: affected >= 0.3.1, <= 0.3.1

## Suggested inspection (read-only)
- `npm ls b20miner --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 b20miner.
- 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-2026-18365 (OSV record MAL-2026-18365 lists affected ranges: npm b20miner >=0.3.1 <=0.3.1)

Commands are suggestions: review each one before running it.

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