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Critical, CVSS 9.8amended

Malicious Package in bb-builder

GHSA-vm6v-w6q2-mrrq

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 bb-builder

    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 bb-builder contained malicious code. The package ran an executable targeting Windows and uploaded information to a remote server. Recommendation 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 from installing it.

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

    Amended from ghsa record GHSA-vm6v-w6q2-mrrq

  2. Revision 1 · created ·

    Published from osv record GHSA-vm6v-w6q2-mrrq

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-vm6v-w6q2-mrrq

Advisory: Malicious Package in bb-builder
IDs: GHSA-vm6v-w6q2-mrrq
Record: https://patchnext.com/advisories/ghsa-vm6v-w6q2-mrrq (revision 2, source checked 26 Oct 2026, 12:15 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 bb-builder: affected every version

## Suggested inspection (read-only)
- `npm ls bb-builder --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 bb-builder.
- 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-vm6v-w6q2-mrrq (OSV record GHSA-vm6v-w6q2-mrrq lists affected ranges: npm bb-builder >=0.0.0)
- Verified: https://github.com/advisories/GHSA-vm6v-w6q2-mrrq (GitHub-reviewed advisory GHSA-vm6v-w6q2-mrrq lists affected ranges: npm bb-builder >=0.0.0)

Commands are suggestions: review each one before running it.

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