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Vulnerability Database · npm · Package report

underscore: vulnerability history, versions and safety

underscore is a package in the npm ecosystem. Vulert records 2 vulnerabilities for it across 54 releases, from May 2021 to Mar 2026. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.

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2 vulnerabilities recorded C1 H1
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0 with no fix published

Every vulnerability has a patched version to move to.

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1 in the last 12 months

Most recent disclosure 03 Mar 2026.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all underscore vulnerabilities

Vulert verdict on underscore 1.13.8 i

Updated on 23 Oct 2026

Good news: 1.13.8, the version you would install today, has no known vulnerabilities. Older releases do — the table below lists all 2.

Package health score 82/100
  • Security Minor issues
  • Maintenance Sustainable
  • Popularity Key ecosystem project
  • Community Moderate

What to do: Stay on 1.13.8 or newer. This can change: a vulnerability disclosed tomorrow can affect 1.13.8 too — Vulert watches the package and alerts you if that happens. Monitor it with Vulert →

  • Current release 1.13.8 — unaffected i
  • Vulnerabilities on record 2 over 4 years · 1 in the last year i
  • Latest disclosure 03 Mar 2026 i
  • Highest CVSS 9.8 i
  • With no published fix 0 i
  • Depended on by 54,673 packages i
  • Stars 27,313 i
  • OpenSSF scorecard 5/10 i
  • Last release 8 months ago i
  • Licence MIT i

Version list, release dates, licence and dependants published by the npm registry, refreshed 23 Oct 2026. Licence information is not legal advice.

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01 Versions

Which versions are affected

Every version Vulert tracks for underscore, newest first, with the vulnerabilities recorded against each one. A version showing none has no vulnerability in the Vulert database — open it for the full picture on that release.

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Version Released Vulert vulnerabilities Licence Fix published Details
1.13.8 19 Feb 2026 none MIT — Details →
1.13.7 24 Jul 2024 H1 MIT Yes Details →
1.13.6 23 Sep 2022 H1 MIT Yes Details →
1.13.5 23 Sep 2022 H1 MIT Yes Details →
1.13.4 02 Jun 2022 H1 MIT Yes Details →
1.13.3 23 Apr 2022 H1 MIT Yes Details →
1.13.2 16 Dec 2021 H1 MIT Yes Details →
1.13.1 15 Apr 2021 H1 MIT Yes Details →
1.13.0 09 Apr 2021 H1 MIT Yes Details →
1.13.0-3 31 Mar 2021 H1 MIT Yes Details →
1.13.0-2 15 Mar 2021 H1 MIT Yes Details →
1.12.1 15 Mar 2021 H1 MIT Yes Details →
1.13.0-1 11 Mar 2021 H1 MIT Yes Details →
1.13.0-0 10 Mar 2021 H1 MIT Yes Details →
1.12.0 24 Nov 2020 C1 H1 MIT Yes Details →
1.11.0 28 Aug 2020 C1 H1 MIT Yes Details →
1.10.2 30 Mar 2020 C1 H1 MIT Yes Details →
1.10.1 30 Mar 2020 C1 H1 MIT Yes Details →
1.10.0 30 Mar 2020 C1 H1 MIT Yes Details →
1.9.2 06 Jan 2020 C1 H1 MIT Yes Details →
1.9.1 31 May 2018 C1 H1 MIT Yes Details →
1.9.0 18 Apr 2018 C1 H1 MIT Yes Details →
1.8.3 02 Apr 2015 C1 H1 MIT Yes Details →
1.8.2 22 Feb 2015 C1 H1 MIT Yes Details →
1.8.1 20 Feb 2015 C1 H1 MIT Yes Details →
1.8.0 20 Feb 2015 C1 H1 MIT Yes Details →
1.7.0 26 Aug 2014 C1 H1 MIT Yes Details →
1.6.0 10 Feb 2014 C1 H1 MIT Yes Details →
1.5.2 07 Sep 2013 C1 H1 MIT Yes Details →
1.5.1 08 Jul 2013 C1 H1 MIT Yes Details →
1.5.0 06 Jul 2013 C1 H1 MIT Yes Details →
1.4.4 30 Jan 2013 C1 H1 MIT Yes Details →
1.4.3 04 Dec 2012 C1 H1 MIT Yes Details →
1.4.2 07 Oct 2012 C1 H1 MIT Yes Details →
1.4.1 01 Oct 2012 C1 H1 MIT Yes Details →
1.4.0 27 Sep 2012 C1 H1 MIT Yes Details →
1.3.3 10 Apr 2012 C1 H1 MIT Yes Details →
1.3.2 09 Apr 2012 C1 H1 MIT Yes Details →
1.3.1 23 Jan 2012 H1 MIT Yes Details →
1.3.0 11 Jan 2012 H1 MIT Yes Details →
1.2.4 09 Jan 2012 H1 MIT Yes Details →
1.0.3 07 Dec 2011 H1 MIT Yes Details →
1.0.4 07 Dec 2011 H1 MIT Yes Details →
1.1.0 07 Dec 2011 H1 MIT Yes Details →
1.1.1 07 Dec 2011 H1 MIT Yes Details →
1.1.2 07 Dec 2011 H1 MIT Yes Details →
1.1.3 07 Dec 2011 H1 MIT Yes Details →
1.1.4 07 Dec 2011 H1 MIT Yes Details →
1.1.5 07 Dec 2011 H1 MIT Yes Details →
1.1.6 07 Dec 2011 H1 MIT Yes Details →
1.1.7 07 Dec 2011 H1 MIT Yes Details →
1.2.0 07 Dec 2011 H1 MIT Yes Details →
1.2.1 07 Dec 2011 H1 MIT Yes Details →
1.2.3 07 Dec 2011 H1 MIT Yes Details →
1.2.2 14 Nov 2011 H1 MIT Yes Details →

All 55 versions Vulert tracks for this package. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2021 1
  • 2026 1

Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 1 of the 2 were recorded in the last 12 months.

03 Vulnerabilities

Recorded vulnerabilities for underscore

The 2 most severe of 2 vulnerabilities recorded for this package

Search all 2 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
CVE-2021-23358: Arbitrary Code Execution in underscore 9.8 critical 1.12.1 06 May 2021
CVE-2026-27601: Underscore Package Suffers from Unlimited Recursion Vulnerability Leading to Potential DoS Attack 8.2 high 1.13.8 03 Mar 2026

Vulnerability wrong, a fix missing, or a package we should cover? Report it and we will fix the record. Report Vulnerability Provide Feedback

Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315

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Questions

About underscore

Is underscore safe to use?

Vulert records 2 vulnerabilities for underscore in npm: 1 critical, 1 high, 0 medium and 0 low. Every one of them has a published fix, so the practical answer is to run a supported release and keep it patched.

What is underscore's Vulert package health score?

Vulert scores underscore 82/100, which reads as in good shape. The score weighs the vulnerability record (40), maintenance and release cadence (25), adoption from dependents and stars (20) and community signals such as the OpenSSF scorecard and forks (15).

Is the latest version of underscore affected?

No. 1.13.8, the version you would install today, has no vulnerabilities on record against it. Earlier releases do — the version table above lists each release with what affects it.

Which version of underscore should I use?

1.13.8 is the version Vulert recommends for the affected releases. The version table above lists every release with the vulnerabilities recorded against it, so you can confirm the range you actually run.

How many vulnerabilities does underscore have?

2 vulnerabilities are recorded for underscore in the npm ecosystem: 1 critical, 1 high, 0 medium and 0 low. The ledger on this page lists the same counts next to the date of the most recent disclosure.

How often are new underscore vulnerabilities disclosed?

1 vulnerability was recorded for underscore in the last 12 months, and the oldest entry in this database dates to 06 May 2021. Recency matters more than a lifetime total: it shows how actively new issues are being disclosed for the package you are considering.

Which versions of underscore are affected?

Each vulnerability on this page lists the affected version range and the fixed version to move to. Open the vulnerability for the version you actually run — fixes are specific to a release line, not to the package as a whole.

How do I monitor underscore for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the underscore version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.