CVE Tools
Sign in

CVE-2025-32442

Fastify vulnerable to invalid content-type parsing, which could lead to validation bypass

Published: Apr 18, 2025Updated: Aug 22, 2025 Sources: CVE List NVD GHSACWE-1287
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.6%
Top 54.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-1287

Affected Products

fastifyfastify
Library
OSS Libraries / web-framework
fastifynpmOSS Libraries
fastifyoss-projectOSS Librariesaka fastify/middie, fastify-multipart
npmpackage-ecosystemOSS Libraries

Exploitability

Official Patch Available

References

https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418
github.com
https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4
github.com
https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc
github.com
and 3 more references View all →

Timeline

Published
Apr 18, 2025
Last Updated
Aug 22, 2025

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-32442 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows