CVE-2020-8287

Exp

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: 2021-01-06 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-8287 is rated High Exploit Risk (79.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 16.30%, 97th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +4.43% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-8287

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-8287

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 11.87% 16.30% +4.43%
2 2026-03-18 11.05% 11.87% +0.81%
3 2026-03-04 — 11.05% —

Full EPSS history (55 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-8287

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 2.5 [email protected]
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2020-8287

OS Trackers for CVE-2020-8287

vendor priority summary link
alpine medium CVE-2020-8287: 2 source package rows (nodejs, nodejs-current); 51 state rows across 16 repos (3.11-main, 3.12-main, 3.17-community, 3.17-main, 3.18-community, 3.18-main, 3.19-community, 3.19-main, 3.20-community, 3.20-main, 3.21-community, 3.21-main, 3.22-community, 3.22-main, edge-community, edge-main); fixed 16, open 35. https://security.alpinelinux.org/vuln/CVE-2020-8287
debian not yet assigned CVE-2020-8287 not yet assigned priority: Debian including 2 source packages (http-parser, nodejs), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10. https://security-tracker.debian.org/tracker/CVE-2020-8287
gentoo normal CVE-2020-8287: 1 GLSA(s) (202101-07), 1 atom(s) (net-libs/nodejs); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-8287
redhat low — https://access.redhat.com/security/cve/CVE-2020-8287
suse medium CVE-2020-8287 severity moderate: SUSE including 67 source package names (12:nodejs12-12.20.1-4.10.1, 12:npm12-12.20.1-4.10.1, …), 219 product×package rows across 29 product lines (Container bci/node, Container bci/nodejs, … (29 product lines)): Fixed 219. https://www.suse.com/security/cve/CVE-2020-8287/
ubuntu medium CVE-2020-8287 medium priority: Ubuntu including 2 source packages (http-parser, nodejs), 29 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, ignored 10, released 4, needs-triage 3. https://ubuntu.com/security/CVE-2020-8287

Affected software / configurations for CVE-2020-8287

Vendor Product Version Raw CPE
nodejs node.js >= 10.0.0, < 10.23.1 cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*
nodejs node.js >= 12.0.0, < 12.20.1 cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*
nodejs node.js >= 14.0.0, < 14.15.4 cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*
nodejs node.js >= 15.0.0, < 15.5.1 cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
fedoraproject fedora 32 cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
fedoraproject fedora 33 cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
oracle graalvm 19.3.4 cpe:2.3:a:oracle:graalvm:19.3.4:*:*:*:enterprise:*:*:*
oracle graalvm 20.3.0 cpe:2.3:a:oracle:graalvm:20.3.0:*:*:*:enterprise:*:*:*
siemens sinec_infrastructure_network_services < 1.0.1.1 cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*

References for CVE-2020-8287

URL Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch Third Party Advisory
https://hackerone.com/reports/1002188 Exploit Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00009.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H472D5HPXN6RRXCNFML3BK5OYC52CXF2/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K4I6MZNC7C7VIDQR267OL4TVCI3ZKAC4/
https://nodejs.org/en/blog/vulnerability/january-2021-security-releases/ Patch Vendor 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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