Vulnerability Database · npm · fastify · Version
fastify 5.12.0
5.12.0 is affected by 7 vulnerabilities.
The vulnerabilities that cover this exact version are listed below with the fixed version to move to.
Critical 0 High 4 Medium 3 Low 0 Unrated 0
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Released 13 Aug 2026
Licence MIT
Also known from other sources 7
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 5.12.0 vulnerabilities
7 vulnerabilities cover fastify 5.12.0. 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 |
| CVE-2026-16732: Fastify X-Forwarded-* Spoofing Vulnerability | 6.1 medium | 5.12.1 | 02 Sep 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 |
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Questions
About fastify 5.12.0
Is fastify 5.12.0 vulnerable?
Yes. 7 vulnerabilities in the Vulert database cover fastify 5.12.0: 0 critical, 4 high, 3 medium and 0 low. Each entry above names the fixed version to move to.
Is 5.12.0 the latest release of fastify?
No. 5.12.0 was published 13 Aug 2026, 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.