How severe is CVE-2022-39288?

CVE-2022-39288 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-39288 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 59% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-39288?

CVE-2022-39288 affects Fastify. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-39288?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-39288 published?

CVE-2022-39288 was published on 2022-10-10 and last updated on 2026-06-17.

CVE-2022-39288

CVE-2022-39288 is a high-severity vulnerability in Fastify with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 59% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-754.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 59% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-754
Affected product: Fastify
Published: 2022-10-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-39288?: 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.
How severe is CVE-2022-39288?: CVE-2022-39288 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-39288 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 59% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-39288?: CVE-2022-39288 affects Fastify. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-39288?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-39288 published?: CVE-2022-39288 was published on 2022-10-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fastify:fastify:*:*:*:*:*:node.js:*:*

More vulnerabilities in Fastify

CVE-2026-33806 — High (CVSS 7.5): Impact: Fastify applications using schema.body.content for per-content-type body validation can have validation…
CVE-2026-25223 — High (CVSS 7.5): Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.2, a validation bypass…
CVE-2025-32442 — High (CVSS 7.5): 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,…
CVE-2018-3711 — High (CVSS 7.5): Fastify node module before 0.38.0 is vulnerable to a denial-of-service attack by sending a request with "Content-Type:…
CVE-2020-8192 — Medium (CVSS 6.5): A denial of service vulnerability exists in Fastify v2.14.1 and v3.0.0-rc.4 that allows a malicious user to trigger…
CVE-2026-3635 — Medium (CVSS 6.1): Summary When trustProxy is configured with a restrictive trust function (e.g., a specific IP like trustProxy:…

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