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Vulnerability Details :

CVE-2025-32442

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-18 Apr, 2025 | 15:59
Updated At-22 Aug, 2025 | 20:50
Rejected At-
Credits

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

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:18 Apr, 2025 | 15:59
Updated At:22 Aug, 2025 | 20:50
Rejected At:
▼CVE Numbering Authority (CNA)
Fastify vulnerable to invalid content-type parsing, which could lead to validation bypass

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.

Affected Products
Vendor
fastify
Product
fastify
Versions
Affected
  • >= 5.0.0, < 5.3.2
  • = 4.29.0
Problem Types
TypeCWE IDDescription
CWECWE-1287CWE-1287: Improper Validation of Specified Type of Input
Type: CWE
CWE ID: CWE-1287
Description: CWE-1287: Improper Validation of Specified Type of Input
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc
x_refsource_CONFIRM
https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418
x_refsource_MISC
https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4
x_refsource_MISC
https://hackerone.com/reports/3087928
x_refsource_MISC
Hyperlink: https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418
Resource:
x_refsource_MISC
Hyperlink: https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4
Resource:
x_refsource_MISC
Hyperlink: https://hackerone.com/reports/3087928
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:18 Apr, 2025 | 16:15
Updated At:22 Aug, 2025 | 21:15

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CPE Matches
fastify
fastify
>>fastify>>Versions from 5.0.0(inclusive) to 5.3.2(exclusive)
cpe:2.3:a:fastify:fastify:*:*:*:*:*:node.js:*:*
fastify
fastify
>>fastify>>4.29.0
cpe:2.3:a:fastify:fastify:4.29.0:*:*:*:*:node.js:*:*
Weaknesses
CWE IDTypeSource
CWE-1287Secondarysecurity-advisories@github.com
CWE ID: CWE-1287
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418security-advisories@github.com
Patch
https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4security-advisories@github.com
Patch
https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwcsecurity-advisories@github.com
Exploit
Third Party Advisory
https://hackerone.com/reports/3087928security-advisories@github.com
Permissions Required
Hyperlink: https://github.com/fastify/fastify/commit/436da4c06dfbbb8c24adee3a64de0c51e4f47418
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/fastify/fastify/commit/f3d2bcb3963cd570a582e5d39aab01a9ae692fe4
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc
Source: security-advisories@github.com
Resource:
Exploit
Third Party Advisory
Hyperlink: https://hackerone.com/reports/3087928
Source: security-advisories@github.com
Resource:
Permissions Required

Change History

0
Information is not available yet

Similar CVEs

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CVE-2023-51701
Matching Score-8
Assigner-GitHub, Inc.
ShareView Details
Matching Score-8
Assigner-GitHub, Inc.
CVSS Score-5.3||MEDIUM
EPSS-0.23% / 45.61%
||
7 Day CHG~0.00%
Published-08 Jan, 2024 | 13:55
Updated-03 Jun, 2025 | 14:37
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
@fastify-reply-from JSON Content-Type parsing confusion

fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. A reverse proxy server built with `@fastify/reply-from` could misinterpret the incoming body by passing an header `ContentType: application/json ; charset=utf-8`. This can lead to bypass of security checks. This vulnerability has been patched in '@fastify/reply-from` version 9.6.0.

Action-Not Available
Vendor-fastifyfastify
Product-reply-fromfastify-reply-from
CWE ID-CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Details not found