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Vulnerability record · CVE-2020-8287 · published 6 January 2021

CVE-2020-8287: Nodejs node.js http request smuggling vulnerability

Nodejs · Node.Js

Node.js versions before 10.23.1, 12.20.1, 14.15.4, 15.5.1 allow two copies of a header field in an HTTP request (for example, two Transfer-Encoding header fields). In this case, Node.js identifies the first header field and ignores the second. This can lead to HTTP Request Smuggling.

6.5 CVSS 3.1 Medium EPSS 16% · top 3.2% CWE-444 · HTTP request smuggling
6.5CVSS 3.1 base score, v2 6.4
16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
20References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Node.js versions before 10.23.1, 12.20.1, 14.15.4, 15.5.1 allow two copies of a header field in an HTTP request (for example, two Transfer-Encoding header fields). In this case, Node.js identifies the first header field and ignores the second. This can lead to HTTP Request Smuggling.

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

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf PatchThird Party Advisory
https://hackerone.com/reports/1002188 ExploitIssue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00009.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H472D5HPXN6RRXCNFML3BK5
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K4I6MZNC7C7VIDQR267OL4T
https://nodejs.org/en/blog/vulnerability/january-2021-security-releases/ PatchVendor Advisory
https://security.gentoo.org/glsa/202101-07 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210212-0003/ Third Party Advisory
https://www.debian.org/security/2021/dsa-4826 Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.html Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf PatchThird Party Advisory
https://hackerone.com/reports/1002188 ExploitIssue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00009.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H472D5HPXN6RRXCNFML3BK5
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K4I6MZNC7C7VIDQR267OL4T
https://nodejs.org/en/blog/vulnerability/january-2021-security-releases/ PatchVendor Advisory
https://security.gentoo.org/glsa/202101-07 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210212-0003/ Third Party Advisory
https://www.debian.org/security/2021/dsa-4826 Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.html Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-8287), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.