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…

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.

Timeline

Scores

EPSS (exploitation in 30 days)

16.3% · top 3.0% of all CVEs (7 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• CWE-444: HTTP Request Smuggling (CWE-444) (opens in a new tab)All about CWE-444 and its CVEs

Affected products

• NodeJS · Node

  • affected 4.0 – < 4.*
  • affected 5.0 – < 5.*
  • affected 6.0 – < 6.*
  • affected 7.0 – < 7.*
  • affected 8.0 – < 8.*
  • affected 9.0 – < 9.*
  • affected 10.0 – < 10.23.1
  • affected 11.0 – < 11.*
  • affected 12.0 – < 12.20.1
  • affected 13.0 – < 13.*
  • affected 14.0 – < 14.15.4
  • affected 15.0 – < 15.5.1

References (10)

• https://hackerone.com/reports/1002188 (opens in a new tab)x_transferred
• https://nodejs.org/en/blog/vulnerability/january-2021-security-releases/ (opens in a new tab)x_transferred
• DSA-4826 (opens in a new tab)vendor-advisoryx_transferred
• FEDORA-2021-fb1a136393 (opens in a new tab)vendor-advisoryx_transferred
• GLSA-202101-07 (opens in a new tab)vendor-advisoryx_transferred
• FEDORA-2021-d5b2c18fe6 (opens in a new tab)vendor-advisoryx_transferred
• https://www.oracle.com/security-alerts/cpujan2021.html (opens in a new tab)x_transferred
• https://security.netapp.com/advisory/ntap-20210212-0003/ (opens in a new tab)x_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf (opens in a new tab)x_transferred
• [debian-lts-announce] 20221205 [SECURITY] [DLA 3224-1] http-parser security update (opens in a new tab)mailing-listx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2020-8287](https://trackcve.app/badge/CVE-2020-8287.svg)](https://trackcve.app/cve/CVE-2020-8287)

Record last updated 30 Apr 2025, 22:24 UTC.