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Vulnerability Database · npm · fastify · Version

fastify 4.18.0

4.18.0 is affected by 9 vulnerabilities.

The vulnerabilities that cover this exact version are listed below with the fixed version to move to.

Critical 0 High 5 Medium 3 Low 1 Unrated 0

All fastify versions & vulnerabilities → Source repository Search the database for this package →
Released 09 Jun 2023 Licence MIT Also known from other sources 9 Newer releases 300 Database updated 23/Oct/2026

Release and licence data published by the npm registry. Licence information is not legal advice.

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01 Vulnerabilities affecting this version

fastify 4.18.0 vulnerabilities

9 vulnerabilities cover fastify 4.18.0. Open the full list in the database.

Vulnerability Severity Fixed version Disclosed
CVE-2026-84504: Fastify Request Body Replacement Vulnerability 8.1 high 5.12.2 30 Sep 2026
CVE-2026-76169: Fastify Authentication Bypass via Malformed URLs 7.5 high 5.12.2 30 Sep 2026
CVE-2026-84469: Fastify Request Validation Bypass via Skipped Boolean False Schemas 7.5 high 5.12.2 30 Sep 2026
CVE-2026-84428: Fastify Header Validation Bypass Due to Incomplete Schema Case Normalization 7.5 high 5.12.2 30 Sep 2026
Content-Type Header Tab Character Vulnerability in Fastify 7.5 high 5.7.2 02 Feb 2026
CVE-2026-3635: Fastify Request Protocol and Host Spoofing Vulnerability 6.1 medium 5.8.3 25 Mar 2026
CVE-2026-92081: Fastify Denial of Service via Unhandled Exception on HTTP/2 Trailer Responses 5.9 medium 5.12.5 30 Sep 2026
CVE-2026-18504: fastify Vulnerable to Schema Validation Bypass via Root Primitive Coercion Mismatch 5.4 medium 5.12.1 02 Sep 2026
CVE-2026-25224: Fastify Denial of Service Vulnerability via Unbounded Memory Allocation 3.7 low 5.7.3 02 Feb 2026

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Questions

About fastify 4.18.0

Is fastify 4.18.0 vulnerable?

Yes. 9 vulnerabilities in the Vulert database cover fastify 4.18.0: 0 critical, 5 high, 3 medium and 1 low. Each entry above names the fixed version to move to.

Is 4.18.0 the latest release of fastify?

No. 4.18.0 was published 09 Jun 2023, and newer releases exist. Newer is not automatically safer — the version table on the package page shows what each release carries.

How do I monitor fastify for upcoming vulnerabilities?

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