CVE catalog

CVE-2021-39135

npm affected and fixed versions

`@npmcli/arborist`, the library that calculates dependency trees and manages the node_modules folder hierarchy for the npm command line interface, aims to guarantee that package dependency contracts will be met, and the extraction of package contents will always be performed into the expected folder. This is accomplished by extracting package contents into a project's `node_modules` folder. If the `node_modules` folder of the root project or any of its dependencies is somehow replaced with a symbolic link, it could allow Arborist to write package dependencies to any arbitrary location on the file system. Note that symbolic links contained within package artifact contents are filtered out, so another means of creating a `node_modules` symbolic link would have to be employed. 1. A `preinstall` script could replace `node_modules` with a symlink. (This is prevented by using `--ignore-scripts`.) 2. An attacker could supply the target with a git repository, instructing them to run `npm install --ignore-scripts` in the root. This may be successful, because `npm install --ignore-scripts` is typically not capable of making changes outside of the project directory, so it may be deemed safe. This is patched in @npmcli/arborist 2.8.2 which is included in npm v7.20.7 and above. For more information including workarounds please see the referenced GHSA-gmw6-94gg-2rc2.

Severity: High · CVSS 8.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Published: Aug 31, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.56% · Oct 27, 2026

Projects and upstream resources

[npm][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	npm	`7.24.0+ds-2`	FixedDistribution-reported fixed boundary	[CVE-2021-39135]
Debiantrixie	npm	`9.2.0~ds1-3`	Fixed	[CVE-2021-39135]
Debiansid	npm	`12.2.0+ds1-1`	Fixed	[CVE-2021-39135]
Debiansid	npm	`7.24.0+ds-2`	FixedDistribution-reported fixed boundary	[CVE-2021-39135]
Debianforky	npm	`12.2.0+ds1-1`	Fixed	[CVE-2021-39135]
Debianforky	npm	`7.24.0+ds-2`	FixedDistribution-reported fixed boundary	[CVE-2021-39135]
Debianbookworm	npm	`7.24.0+ds-2`	FixedDistribution-reported fixed boundary	[CVE-2021-39135]
Debianbookworm	npm	`9.2.0~ds1-1`	Fixed	[CVE-2021-39135]

Showing 8 fix observations. All 29 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
UnknownRelease not reported	npm	`7.24.0+ds-2`	UnknownSource applicability is not established	Provider not reported
Alpine3.11	nodejs	`12.22.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.12	nodejs	`12.22.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.13	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.14	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.15	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.16	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.17	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.18	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.19	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.20	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.21	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.22	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.23	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Alpine3.24	nodejs	`14.17.6-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2021-39135]Oct 23, 2026, 5:17:56 PM UTC
Debianbookworm	npm	`7.24.0+ds-2`	FixedDistribution-reported fixed boundary	[CVE-2021-39135]
Debianbookworm	npm	`9.2.0~ds1-1`	Fixed	[CVE-2021-39135]
Debianforky	npm	`12.2.0+ds1-1`	Fixed	[CVE-2021-39135]
Debianforky	npm	`7.24.0+ds-2`	FixedDistribution-reported fixed boundary	[CVE-2021-39135]
Debiansid	npm	`12.2.0+ds1-1`	Fixed	[CVE-2021-39135]
Debiansid	npm	`7.24.0+ds-2`	FixedDistribution-reported fixed boundary	[CVE-2021-39135]
Debiantrixie	npm	`7.24.0+ds-2`	FixedDistribution-reported fixed boundary	[CVE-2021-39135]
Debiantrixie	npm	`9.2.0~ds1-3`	Fixed	[CVE-2021-39135]
Ubuntu14.04	npm	`1.2.18~dfsg-3`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-39135]Oct 24, 2025, 4:50:29 AM UTC
Ubuntu14.04	npm	`1.3.10~dfsg-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-39135]Oct 24, 2025, 4:50:29 AM UTC
Ubuntu20.04	npm	`5.8.0+ds6-4`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-39135]Oct 24, 2025, 4:50:29 AM UTC
Ubuntu20.04	npm	`6.14.4+ds-1ubuntu2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-39135]Oct 24, 2025, 4:50:29 AM UTC
Ubuntupro	npm	`3.5.2-0ubuntu4`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-39135]Oct 24, 2025, 4:50:29 AM UTC
Ubuntupro	npm	`3.5.2-0ubuntu4.1.18.04.1~esm1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-39135]Oct 24, 2025, 4:50:29 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "npm",
      "status": "fixed",
      "release": "sid",
      "version": "12.2.0+ds1-1"
    },
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      "name": "npm",
      "status": "fixed",
      "release": "forky",
      "version": "12.2.0+ds1-1"
    },
    {
      "name": "npm",
      "status": "fixed",
      "release": "trixie",
      "version": "9.2.0~ds1-3"
    },
    {
      "name": "npm",
      "status": "fixed",
      "release": "bookworm",
      "version": "9.2.0~ds1-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 993405,
      "name": "npm",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "7.24.0+ds-2"
    },
    {
      "bug": 993405,
      "name": "npm",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "7.24.0+ds-2"
    },
    {
      "bug": 993405,
      "name": "npm",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "7.24.0+ds-2"
    },
    {
      "bug": 993405,
      "name": "npm",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "7.24.0+ds-2"
    }
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    },
    {
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      "release": "3.11",
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      "ecosystem": "apk",
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      "provider_source": "pypi",
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    },
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      "versions": [],
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      "provider_source": "pypi",
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    },
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      "applicability_unknown": true
    },
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      "provider_updated_at": "2025-10-24T04:50:29Z",
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      "provider_updated_at": "2025-10-24T04:50:29Z",
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    }
  ]
}

[Debian bug #993405]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[npm]Unknown
Details (2)
- 9.2.0~ds1-1 · all · bookworm
  Fixed · Fixed: 7.24.0+ds-2
  dsa · npm · debian · bookworm; dsa · npm · debian · 12
- 9.2.0~ds1-1 · all · bookworm
  Fixed · Fixed: 7.24.0+ds-2
  dsa · npm · debian · bookworm; dsa · npm · debian · 12

[Debian 13 (Trixie)]

[npm]Unknown
Details (2)
- 9.2.0~ds1-3 · all · trixie
  Fixed · Fixed: 7.24.0+ds-2
  dsa · npm · debian · 13
- 9.2.0~ds1-3 · all · trixie
  Fixed · Fixed: 7.24.0+ds-2
  dsa · npm · debian · 13

Observed: Oct 23, 2026, 6:01:55 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]