{"id":"CVE-2020-8287","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-8287","generatedAt":"2026-11-05T01:47:33.676Z","title":"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).","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.","published":"2021-01-06T21:15:15.000Z","lastModified":"2026-06-17T03:26:14.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},"cwe":["CWE-444"],"affected":["nodejs/node.js","debian/debian linux","fedoraproject/fedora","oracle/graalvm","siemens/sinec infrastructure network services"],"epss":{"score":0.16296,"percentile":0.96959,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 16.3%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf","tags":["Patch","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/1002188","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://lists.debian.org/debian-lts-announce/2022/12/msg00009.html","tags":["Mailing List","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H472D5HPXN6RRXCNFML3BK5OYC52CXF2/","source":"support@hackerone.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K4I6MZNC7C7VIDQR267OL4TVCI3ZKAC4/","source":"support@hackerone.com"},{"url":"https://nodejs.org/en/blog/vulnerability/january-2021-security-releases/","tags":["Patch","Vendor Advisory"],"source":"support@hackerone.com"},{"url":"https://security.gentoo.org/glsa/202101-07","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://security.netapp.com/advisory/ntap-20210212-0003/","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://www.debian.org/security/2021/dsa-4826","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://www.oracle.com/security-alerts/cpujan2021.html","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/1002188","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/12/msg00009.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H472D5HPXN6RRXCNFML3BK5OYC52CXF2/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K4I6MZNC7C7VIDQR267OL4TVCI3ZKAC4/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://nodejs.org/en/blog/vulnerability/january-2021-security-releases/","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202101-07","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210212-0003/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2021/dsa-4826","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpujan2021.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-8287","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}