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Vulnerability Database · npm · Package report

@fastify/middie: vulnerability history, versions and safety

@fastify/middie is a package in the npm ecosystem. Vulert records 4 vulnerabilities for it across 17 releases, from Jan 2026 to Apr 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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4 vulnerabilities recorded C1 H3
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0 with no fix published

Every vulnerability has a patched version to move to.

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4 in the last 12 months

Most recent disclosure 16 Apr 2026.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all @fastify/middie vulnerabilities

Vulert verdict on @fastify/middie 9.3.6 i

Updated on 23 Oct 2026

Good news: 9.3.6, the version you would install today, has no known vulnerabilities. Older releases do — the table below lists all 4.

Package health score 70/100
  • Security Some issues to review
  • Maintenance Sustainable
  • Popularity Niche
  • Community Quiet

What to do: Stay on 9.3.6 or newer. This can change: a vulnerability disclosed tomorrow can affect 9.3.6 too — Vulert watches the package and alerts you if that happens. Monitor it with Vulert →

  • Current release 9.3.6 — unaffected i
  • Vulnerabilities on record 4 over 1 year · 4 in the last year i
  • Latest disclosure 16 Apr 2026 i
  • Highest CVSS 9.1 i
  • With no published fix 0 i
  • Depended on by 130 packages i
  • Stars 276 i
  • Last release this month 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 @fastify/middie, 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
9.3.6 20 Oct 2026 none MIT — Details →
9.3.5 08 Oct 2026 none MIT — Details →
9.3.4 04 Sep 2026 none MIT — Details →
9.3.3 30 Jun 2026 none MIT — Details →
9.3.2 16 Apr 2026 none MIT — Details →
9.3.1 05 Mar 2026 C1 H1 MIT Yes Details →
9.3.0 05 Mar 2026 C1 H1 MIT Yes Details →
9.2.0 27 Feb 2026 C1 H1 MIT Yes Details →
9.1.0 03 Jan 2026 C1 H2 MIT Yes Details →
9.0.3 11 Jan 2025 C1 H3 MIT Yes Details →
9.0.2 21 Sep 2024 C1 H3 MIT Yes Details →
8.3.3 13 Sep 2024 C1 H3 MIT Yes Details →
9.0.1 11 Sep 2024 C1 H3 MIT Yes Details →
8.3.2 11 Sep 2024 C1 H3 MIT Yes Details →
9.0.0 04 Sep 2024 C1 H3 MIT Yes Details →
9.0.0-pre.fv5.2 06 Aug 2024 C1 H3 MIT Yes Details →
9.0.0-pre.fv5.1 18 Jun 2024 C1 H3 MIT Yes Details →
8.3.1 01 May 2024 C1 H3 MIT Yes Details →
8.3.0 14 May 2023 C1 H3 MIT Yes Details →
8.2.0 03 May 2023 C1 H3 MIT Yes Details →
8.1.0 05 Dec 2022 C1 H3 MIT Yes Details →
8.0.0 06 Jun 2022 C1 H3 MIT Yes Details →

All 22 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 4

Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 4 of the 4 were recorded in the last 12 months.

03 Vulnerabilities

Recorded vulnerabilities for @fastify/middie

The 4 most severe of 4 vulnerabilities recorded for this package

Search all 4 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
CVE-2026-6270: @fastify/middie Middleware Authentication Bypass in Child Plugin Scopes 9.1 critical 9.3.2 16 Apr 2026
CVE-2026-22031: @fastify/middie Authentication Bypass via URL Encoding 8.4 high 9.1.0 20 Jan 2026
CVE-2026-2880: @fastify/middie Improper Path Normalization Vulnerability 8.2 high 9.2.0 28 Feb 2026
CVE-2026-33804: @fastify/middie Middleware Bypass Due to Deprecated ignoreDuplicateSlashes Option 7.4 high 9.3.2 16 Apr 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 @fastify/middie

Is @fastify/middie safe to use?

Vulert records 4 vulnerabilities for @fastify/middie in npm: 1 critical, 3 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 @fastify/middie's Vulert package health score?

Vulert scores @fastify/middie 70/100, 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 @fastify/middie affected?

No. 9.3.6, 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.

How many vulnerabilities does @fastify/middie have?

4 vulnerabilities are recorded for @fastify/middie in the npm ecosystem: 1 critical, 3 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 @fastify/middie vulnerabilities disclosed?

4 vulnerabilities were recorded for @fastify/middie in the last 12 months, and the oldest entry in this database dates to 20 Jan 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 @fastify/middie 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 @fastify/middie for upcoming vulnerabilities?

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