CVE-2016-5386

mediumpriority · track · 34EPSS 0.052 · 92 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

5.22% (92nd) EPSS

CVSS 6.8 · medium

Is it mine?

34 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

The net/http package in Go through 1.6 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect CGI applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect a CGI application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedgolang-0:1.6.3-1.el7_2.1.src as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2016:1538
Fixedgolang-0:1.6.3-1.el7_2.1.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2016:1538
Fixedgolang-bin-0:1.6.3-1.el7_2.1.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2016:1538
Fixedgolang-docs-0:1.6.3-1.el7_2.1.noarch as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2016:1538
Fixedgolang-misc-0:1.6.3-1.el7_2.1.noarch as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2016:1538
Fixedgolang-src-0:1.6.3-1.el7_2.1.noarch as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2016:1538
Fixedgolang-tests-0:1.6.3-1.el7_2.1.noarch as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2016:1538

cvss

Technical severity, 0–10. One row per scoring source.

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–8.1

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 5.9

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nsecondary · Red Hat Product Security US

v3.05mediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:Nsecondary · Red Hat Product Security US

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USprimaryCWE-20US

affected products (34)

Products and version ranges known to be affected.

Apache HTTP Serverall versionscert_bundDEcpe:/a:apache:http_server:-
Apache Tomcatall versionscert_bundDEcpe:/a:apache:tomcat:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
EMC VNXall versionscert_bundDEcpe:/h:emc:vnx:-
HPE HP-UXall versionscert_bundDEcpe:/o:hp:hp-ux:-
Open Source CentOSall versionscert_bundDEcpe:/o:centos:centos:-
Open Source PHPall versionscert_bundDEcpe:/a:php:php:-
Open Source Pythonall versionscert_bundDEcpe:/a:python:python:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat JBoss Web Serverall versionscert_bundDEcpe:/a:redhat:jboss_enterprise_web_server:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE Linux Enterprise Desktop 12 SP1all versionscert_bundDEcpe:/o:suse:linux_enterprise_desktop:12:sp1
SUSE Linux Enterprise Server 12 SP1all versionscert_bundDEcpe:/o:suse:linux_enterprise_server:12:sp1
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
TYPO3 Core <8.2.1all versionscert_bundDE
Ubuntu Linux 10.04 LTSall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:10.04:-:lts
TYPO3 Core< 8.2.1cert_bundDE
n/a n/a≤ n/aenisa_euvdEU
fedoraproject fedora= 23nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
fedoraproject fedora= 24nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*

showing 20 of 34

advisories (3)

Vendor and ecosystem advisories describing this.

RHSA-2016:1538Red Hat Security Advisory: golang security, bug fix, and enhancement update2016-08-02csaf · redhat_csafUS
An update for golang is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
WID-SEC-W-2025-2522Mehrere Webserver: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2016-07-18csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in mehreren Webserver Produkten ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
GO-2022-0761Improper input validation in net/http and net/http/cgi2022-08-09vendor · osvUS
An input validation flaw in the CGI components allows the HTTP_PROXY environment variable to be set by the incoming Proxy header, which changes where Go by default proxies all outbound HTTP requests. This environment variable is also used to set the outgoing proxy, enabling an attacker to insert a proxy into outgoing requests of a CGI program. Read more about "httpoxy" here: https://httpoxy.org.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd redhat_csaf osv NVD CVE.org MITRE

published 2016-07-19modified 2026-06-17

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references (27)

External citations — patches, advisories, analysis.

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