CVE-2018-3711

mediumpriority · track · 31EPSS 0.018 · 78 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.77% (78th) EPSS

CVSS 5 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

Fastify node module before 0.38.0 is vulnerable to a denial-of-service attack by sending a request with "Content-Type: application/json" and a very large payload.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USprimaryCWE-400USCWE-770US

affected products (3)

Products and version ranges known to be affected.

HackerOne fastify node module≤ Versions before 0.38.0enisa_euvdEU
fastify fastify< 0.38.0nvdUScpe:2.3:a:fastify:fastify:*:*:*:*:*:*:*:*
npm fastify< 0.38.0osvUSpkg:npm/fastify

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-mq6c-fh97-4gwvDenial of Service vulnerability with large JSON payloads in fastify2018-07-18ghsa · osvUS
Affected versions of `fastify` are vulnerable to a denial of service when processing a request with `Content-Type` set to `application/json` and a very large payload. ## Recommendation Update to version 0.38.0 or later.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2018-06-07modified 2026-06-17

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+3259 more

references (6)

External citations — patches, advisories, analysis.

https://github.com/fastify/fastify/pull/627 cnnvd
https://hackerone.com/reports/303632 cnnvd
https://github.com/fastify/fastify/pull/627 enisa_euvd
https://hackerone.com/reports/303632 enisa_euvd
https://github.com/fastify/fastify/pull/627ExploitIssue TrackingThird Party Advisorynvd
https://hackerone.com/reports/303632ExploitIssue TrackingThird Party Advisorynvd

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