CVE-2020-8201

Name: CVE-2020-8201
Creator: NVD / NIST
Published: 2020-09-18T21:15:12.903+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 5.09%

Last modified Jun 17, 2026

CVE-2020-8201 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. Node.js < 12.18.4 and < 14.11 can be exploited to perform HTTP desync attacks and deliver malicious payloads to unsuspecting users. The payloads can be crafted by an attacker to hijack user sessions, poison cookies, perform clickjacking, and a multitude of other attacks depending on the architecture of the underlying system. EPSS estimates a 5.09% chance of exploitation in the next 30 days.

Description

Node.js < 12.18.4 and < 14.11 can be exploited to perform HTTP desync attacks and deliver malicious payloads to unsuspecting users. The payloads can be crafted by an attacker to hijack user sessions, poison cookies, perform clickjacking, and a multitude of other attacks depending on the architecture of the underlying system. The attack was possible due to a bug in processing of carrier-return symbols in the HTTP header names.

Metrics

CVSS 3.1

7.4/10

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

EPSS Probability

5.09%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nodejs	Node.Js	>= 12.0.0, < 12.18.4
Nodejs	Node.Js	>= 14.0.0, < 14.11.0
Opensuse	Leap	15.2
Fedoraproject	Fedora	33

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.htmlThird Party Advisory
https://hackerone.com/reports/922597Permissions Required
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/Vendor Advisory
https://security.gentoo.org/glsa/202101-07Third Party Advisory
https://security.netapp.com/advisory/ntap-20201009-0004/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.htmlThird Party Advisory
https://hackerone.com/reports/922597Permissions Required
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/Vendor Advisory
https://security.gentoo.org/glsa/202101-07Third Party Advisory
https://security.netapp.com/advisory/ntap-20201009-0004/Third Party Advisory

Timeline

Published: Sep 18, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8201?

How severe is CVE-2020-8201?

CVE-2020-8201 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 5.09% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8201?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8201?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST