CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NCVE-2025-32442
High (7.5) in fastify fastify. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in fastify 4.29.1, 5.3.2, 5.8.5.
Fastify is a fast and low overhead web framework, for Node.js. In versions 5.0.0 to 5.3.0 as well as version 4.29.0, applications that specify different validation strategies for different content types have a possibility to bypass validation by providing a _slightly altered_ content type such as with different casing or altered whitespacing before `;`. This was patched in v5.3.1, but the initial patch did not cover all problems. This has been fully patched in v5.3.2 and v4.29.1. A workaround involves not specifying individual content types in the schema.
Severity
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1287
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fastify:fastify
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-247c-9743-5963 | npm | fastify | >=5.3.2 <5.8.5 | 5.8.5 |
| GHSA-mg2h-6x62-wpwc | npm | fastify | >=5.0.0 <5.3.2 | 5.3.2 |
| GHSA-mg2h-6x62-wpwc | npm | fastify | >=4.29.0 <4.29.1 | 4.29.1 |