What is CVE-2020-8136?

CVE-2020-8136 is a high-severity vulnerability in Fastify Fastify-Multipart, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-03-20.

How severe is CVE-2020-8136?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Fastify Fastify-Multipart

CVE-2020-8136

Prototype pollution vulnerability in fastify-multipart < 1.0.5 allows an attacker to crash fastify applications parsing multipart requests by sending a specially crafted request.

Vulnerability class: DoS (Denial of Service)

Published 2020-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Fastify Fastify-Multipart
Fastify-Multipart — versions Fixed version: 1.0.5

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

hackerone.com/reports/804772 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-8136?: CVE-2020-8136 is a high-severity vulnerability in Fastify Fastify-Multipart, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-03-20.
How severe is CVE-2020-8136?: High severity. CVSS v3 base score is 7.5 out of 10.