{"cve":"CVE-2016-5387","nvd":{"published":"2016-07-19T02:00:19.837","modified":"2026-06-17T00:49:18.750","status":"Modified","description":"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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":[],"references":["http://lists.opensuse.org/opensuse-updates/2016-07/msg00059.html","http://rhn.redhat.com/errata/RHSA-2016-1624.html","http://rhn.redhat.com/errata/RHSA-2016-1625.html","http://rhn.redhat.com/errata/RHSA-2016-1648.html","http://rhn.redhat.com/errata/RHSA-2016-1649.html"],"products":["apache:http_server","canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","hp:system_management_homepage","opensuse:leap","opensuse:opensuse","oracle:communications_user_data_repository","oracle:enterprise_manager_ops_center","oracle:linux","oracle:solaris","redhat:enterprise_linux_desktop","redhat:enterprise_linux_eus","redhat:enterprise_linux_server","redhat:enterprise_linux_server_aus","redhat:enterprise_linux_server_tus","redhat:enterprise_linux_workstation","redhat:jboss_core_services","redhat:jboss_enterprise_web_server","redhat:jboss_web_server"],"source":"nvd","synced_at":"2026-10-19T20:38:51.654415212+00:00"},"epss":{"cve":"CVE-2016-5387","score":0.55724,"percentile":0.99041,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}