CVE-2016-5387

mediumpriority · attend · 52EPSS 0.557 · 99 %ileDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

55.7% (99th) EPSS

CVSS 6.8 · medium

Is it mine?

62 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

The Apache HTTP Server through 2.4.23 follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue. NOTE: the vendor states "This mitigation has been assigned the identifier CVE-2016-5387"; in other words, this is not a CVE ID for a vulnerability.

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 · 6.8–8.1

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

v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USLLM-inferred

affected products (62)

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
apache http server2.2.0 → 2.2.31nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
apache http server2.4.1 → 2.4.23nvdUScpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

showing 20 of 62

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-0370Apple Mac OS: Mehrere SchwachstellenDeutsch2017-09-25csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstelle in Apple Mac OS ausnutzen, um Code mit Kernel Privilegien auszuführen, Sicherheitsvorkehrungen zu umgehen, einen Denial of Service Angriff durchzuführen oder vertrauliche Daten einzusehen.
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.

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 NVD CVE.org MITRE

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

references (162)

External citations — patches, advisories, analysis.

scry

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