CVE-2025-32442
No exploitation reported by the sources we read.
- Published2025-04-18
- Fixed in5.8.5 · 5.3.2 · 4.29.1
- WeaknessCWE-1287
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2025-04-1816:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-32442?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-32442?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
OSV · NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.x | ≥ 5.3.2, < 5.8.5 | 5.8.5 | OSV |
| 5.x | ≥ 5.0.0, < 5.3.2 | 5.3.2 | NVD · OSV |
| 4.29 | ≥ 4.29.0, < 4.29.1 | 4.29.1 | OSV |
| 4.29 | = 4.29.0 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
- CVE-2025-32442 Red Hat Product Security
Fastify: Fastify vulnerable to invalid content-type parsing, which could lead to validation bypass
Fix
- Update Fastify to 5.8.5 · 5.3.2 · 4.29.1
Advisories and patches
- github.comPatch
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Published
- 2025-04-18
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2025-32442?
Is CVE-2025-32442 actively exploited?
What is the CVSS score for CVE-2025-32442?
Running fastify? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.