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CVE-2020-7699

CriticalPublished

Prototype Pollution

Published: Jul 30, 2020
Updated: Sep 17, 2024
Assigning CNA: snyk
Evidence observed: Aug 5, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

4.8%

Low · next 30 days

Percentile: 91.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

This affects the package express-fileupload before 1.1.8. If the parseNested option is enabled, sending a corrupt HTTP request can lead to denial of service or arbitrary code execution.

Sources

CVE-2020-7699_reproducePoC
针对 CVE-2020-7699 的复现，软件安全原理课程大作业

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