CVE-2022-39288
Highfastify vulnerable to denial of service via malicious Content-Type
Published Oct 11, 2022 · Updated Aug 12, 2026 · Also known as GHSA-455w-c45v-86rg
Key Facts
Patch immediately- CVE-2022-39288 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Fastify.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 59% probability of exploitation in the next 30 days.
- Fixed versions are available, including Fastify 4.8.1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
59%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2022-39288 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
fastify is a fast and low overhead web framework, for Node.js. Affected versions of fastify are subject to a denial of service via malicious use of the Content-Type header. An attacker can send an invalid Content-Type header that can cause the application to crash. This issue has been addressed in commit fbb07e8d and will be included in release version 4.8.1. Users are advised to upgrade. Users unable to upgrade may manually filter out http content with malicious Content-Type headers.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FastifyFastify | >= 4.0.0, >= >= 4.0.0, < 4.8.1 | 4.8.1 |
Patched Releases
Fastify
4.8.1
Timeline
Publicly disclosed
Oct 11, 2022
Last updated
Aug 12, 2026
Weakness Type
- CWE-754 Improper Check for Unusual or Exceptional Conditions
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39288.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2022-39288
- articlehttps://github.com/fastify/fastify/commit/fbb07e8dfad74c69cd4cd2211aedab87194618e3
- articlehttps://github.com/fastify/fastify/security/advisories/GHSA-455w-c45v-86rg
FAQ
Common Questions.
fastify is a fast and low overhead web framework, for Node.js.
Affected: Fastify versions >= 4.0.0, >= >= 4.0.0, < 4.8.1. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Fastify 4.8.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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