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Vulnerability Database · npm · Package report

flatted: vulnerability history, versions and safety

flatted is a package in the npm ecosystem. Vulert records 2 vulnerabilities for it across 41 releases, first recorded in 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 H2
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0 with no fix published

Every vulnerability has a patched version to move to.

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2 in the last 12 months

Most recent disclosure 19 Mar 2026.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all flatted vulnerabilities

Vulert verdict on flatted 3.4.4 i

Updated on 23 Oct 2026

Good news: 3.4.4, the version you would install today, has no known vulnerabilities. Older releases do — the table below lists all 2.

Package health score 77/100
  • Security Some issues to review
  • Maintenance Sustainable
  • Popularity Key ecosystem project
  • Community Quiet

What to do: Stay on 3.4.4 or newer. This can change: a vulnerability disclosed tomorrow can affect 3.4.4 too — Vulert watches the package and alerts you if that happens. Monitor it with Vulert →

  • Current release 3.4.4 — unaffected i
  • Vulnerabilities on record 2 over 1 year · 2 in the last year i
  • Latest disclosure 19 Mar 2026 i
  • Highest CVSS 8.9 i
  • With no published fix 0 i
  • Depended on by 84,582 packages i
  • Stars 1,160 i
  • OpenSSF scorecard 3/10 i
  • Last release 2 months ago i
  • Licence ISC i

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

Concerned about your application's security?

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01 Versions

Which versions are affected

Every version Vulert tracks for flatted, 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
3.4.4 30 Jul 2026 none ISC — Details →
3.4.3 22 Jul 2026 none ISC — Details →
3.4.2 17 Mar 2026 none ISC — Details →
3.4.1 09 Mar 2026 H1 ISC Yes Details →
3.4.0 08 Mar 2026 H1 ISC Yes Details →
3.3.4 02 Mar 2026 H2 ISC Yes Details →
3.3.3 18 Feb 2025 H2 ISC Yes Details →
3.3.2 18 Nov 2024 H2 ISC Yes Details →
3.3.1 21 Feb 2024 H2 ISC Yes Details →
3.3.0 20 Feb 2024 H2 ISC Yes Details →
3.2.13 20 Feb 2024 H2 ISC Yes Details →
3.2.12 20 Feb 2024 H2 ISC Yes Details →
3.2.11 20 Feb 2024 H2 ISC Yes Details →
3.2.10 20 Feb 2024 H2 ISC Yes Details →
3.2.9 16 Sep 2023 H2 ISC Yes Details →
3.2.8 16 Sep 2023 H2 ISC Yes Details →
3.2.7 19 Aug 2022 H2 ISC Yes Details →
3.2.6 27 Jun 2022 H2 ISC Yes Details →
3.2.5 26 Jan 2022 H2 ISC Yes Details →
3.2.4 09 Nov 2021 H2 ISC Yes Details →
3.2.3 09 Nov 2021 H2 ISC Yes Details →
3.2.2 29 Jul 2021 H2 ISC Yes Details →
3.2.1 08 Jul 2021 H2 ISC Yes Details →
3.2.0 01 Jul 2021 H2 ISC Yes Details →
3.1.1 19 Jan 2021 H2 ISC Yes Details →
3.1.0 30 Sep 2020 H2 ISC Yes Details →
3.0.5 10 Sep 2020 H2 ISC Yes Details →
3.0.4 05 Jul 2020 H2 ISC Yes Details →
3.0.3 05 Jul 2020 H2 ISC Yes Details →
3.0.2 26 May 2020 H2 ISC Yes Details →
3.0.1 26 May 2020 H2 ISC Yes Details →
3.0.0 26 May 2020 H2 ISC Yes Details →
2.0.2 29 Mar 2020 H2 ISC Yes Details →
2.0.1 25 Jun 2019 H2 ISC Yes Details →
2.0.0 22 Oct 2018 H2 ISC Yes Details →
1.0.3 11 Oct 2018 H2 ISC Yes Details →
1.0.2 21 Sep 2018 H2 ISC Yes Details →
1.0.1 19 Sep 2018 H2 ISC Yes Details →
1.0.0 18 Sep 2018 H2 ISC Yes Details →
0.2.3 03 Jul 2018 H2 ISC Yes Details →
0.2.2 29 May 2018 H2 ISC Yes Details →
0.2.1 27 Apr 2018 H2 ISC Yes Details →
0.2.0 26 Apr 2018 H2 ISC Yes Details →
0.1.0 26 Apr 2018 H2 ISC Yes Details →

All 44 versions Vulert tracks for this package. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2026 2

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

03 Vulnerabilities

Recorded vulnerabilities for flatted

The 2 most severe of 2 vulnerabilities recorded for this package

Search all 2 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
CVE-2026-33228: Prototype Pollution Vulnerability in flatted Package 8.9 high 3.4.2 19 Mar 2026
CVE-2026-32141: flatted Denial of Service Vulnerability Due to Unbounded Recursion in parse() Function 7.5 high 3.4.0 13 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 flatted

Is flatted safe to use?

Vulert records 2 vulnerabilities for flatted in npm: 0 critical, 2 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 flatted's Vulert package health score?

Vulert scores flatted 77/100, 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 flatted affected?

No. 3.4.4, 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 flatted should I use?

3.4.4 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 flatted have?

2 vulnerabilities are recorded for flatted in the npm ecosystem: 0 critical, 2 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 flatted vulnerabilities disclosed?

2 vulnerabilities were recorded for flatted in the last 12 months, and the oldest entry in this database dates to 13 Mar 2026. 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 flatted 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 flatted for upcoming vulnerabilities?

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