--- id: CVE-2016-5388 title: >- Apache Tomcat 7.x through 7.0.70 and 8.x through 8.5.4, when the CGI Servlet is enabled, 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… summary: >- Apache Tomcat 7.x through 7.0.70 and 8.x through 8.5.4, when the CGI Servlet is enabled, 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… severity: high cvss: 8.1 cvssVector: 'CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-284 vendor: hp product: system_management_homepage affected: - enterprise_linux_desktop = 7.0 - enterprise_linux_hpc_node = 7.0 - enterprise_linux_hpc_node_eus = 7.2 - enterprise_linux_server = 7.0 - enterprise_linux_server_aus = 7.2 - enterprise_linux_server_eus = 7.2 - enterprise_linux_server_tus = 7.2 - enterprise_linux_workstation = 7.0 - system_management_homepage <= 7.5.5.0 - enterprise_linux_desktop = 6.0 - enterprise_linux_hpc_node = 6.0 - enterprise_linux_server = 6.0 - enterprise_linux_workstation = 6.0 - linux = 6 - linux = 7 - 'tomcat >= 6.0, <= 6.0.45' - 'tomcat >= 7.0, <= 7.0.70' - 'tomcat >= 8.0, <= 8.5.4' published: '2016-07-19' updated: '2026-10-15' sourceUpdated: '2026-10-15T16:17:25.597' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2016-5388' references: - url: 'http://lists.opensuse.org/opensuse-updates/2016-09/msg00025.html' label: secalert@redhat.com - url: 'http://rhn.redhat.com/errata/RHSA-2016-1624.html' label: secalert@redhat.com - url: 'http://rhn.redhat.com/errata/RHSA-2016-2045.html' label: secalert@redhat.com - url: 'http://rhn.redhat.com/errata/RHSA-2016-2046.html' label: secalert@redhat.com - url: 'http://www.kb.cert.org/vuls/id/797896' label: secalert@redhat.com - url: >- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html label: secalert@redhat.com - url: >- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html label: secalert@redhat.com - url: 'http://www.securityfocus.com/bid/91818' label: secalert@redhat.com - url: 'http://www.securitytracker.com/id/1036331' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2016:1635' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2016:1636' label: secalert@redhat.com - url: >- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03770en_us label: secalert@redhat.com - url: >- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149 label: secalert@redhat.com - url: >- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05324759 label: secalert@redhat.com - url: >- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 label: secalert@redhat.com - url: 'https://httpoxy.org/' label: secalert@redhat.com - url: >- https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E label: secalert@redhat.com - url: >- https://lists.apache.org/thread.html/6b414817c2b0bf351138911c8c922ec5dd577ebc0b9a7f42d705752d%40%3Cissues.activemq.apache.org%3E label: secalert@redhat.com - url: >- https://lists.apache.org/thread.html/6d3d34adcf3dfc48e36342aa1f18ce3c20bb8e4c458a97508d5bfed1%40%3Cissues.activemq.apache.org%3E label: secalert@redhat.com - url: >- https://lists.apache.org/thread.html/r2853582063cfd9e7fbae1e029ae004e6a83482ae9b70a698996353dd%40%3Cusers.tomcat.apache.org%3E label: secalert@redhat.com - url: >- https://lists.apache.org/thread.html/rc6b2147532416cc736e68a32678d3947b7053c3085cf43a9874fd102%40%3Cusers.tomcat.apache.org%3E label: secalert@redhat.com - url: >- https://lists.apache.org/thread.html/rf21b368769ae70de4dee840a3228721ae442f1d51ad8742003aefe39%40%3Cusers.tomcat.apache.org%3E label: secalert@redhat.com - url: 'https://lists.debian.org/debian-lts-announce/2019/08/msg00015.html' label: secalert@redhat.com - url: 'https://tomcat.apache.org/tomcat-7.0-doc/changelog.html' label: secalert@redhat.com - url: 'https://www.apache.org/security/asf-httpoxy-response.txt' label: secalert@redhat.com - url: 'http://lists.opensuse.org/opensuse-updates/2016-09/msg00025.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://rhn.redhat.com/errata/RHSA-2016-1624.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://rhn.redhat.com/errata/RHSA-2016-2045.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://rhn.redhat.com/errata/RHSA-2016-2046.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://www.kb.cert.org/vuls/id/797896' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html label: af854a3a-2127-422b-91ae-364da2661108 - url: >- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://www.securityfocus.com/bid/91818' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://www.securitytracker.com/id/1036331' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2016:1635' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2016:1636' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03770en_us label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149 label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05324759 label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://httpoxy.org/' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/6b414817c2b0bf351138911c8c922ec5dd577ebc0b9a7f42d705752d%40%3Cissues.activemq.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/6d3d34adcf3dfc48e36342aa1f18ce3c20bb8e4c458a97508d5bfed1%40%3Cissues.activemq.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/r2853582063cfd9e7fbae1e029ae004e6a83482ae9b70a698996353dd%40%3Cusers.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/rc6b2147532416cc736e68a32678d3947b7053c3085cf43a9874fd102%40%3Cusers.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/rf21b368769ae70de4dee840a3228721ae442f1d51ad8742003aefe39%40%3Cusers.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2019/08/msg00015.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://tomcat.apache.org/tomcat-7.0-doc/changelog.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.apache.org/security/asf-httpoxy-response.txt' label: af854a3a-2127-422b-91ae-364da2661108 tags: - nvd - cve.org epss: 0.50896 epssPercentile: 0.98913 ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2026-10-15T15:47:59.700031Z' ingestedAt: '2026-10-15T16:13:11.004Z' --- ## Overview Apache Tomcat 7.x through 7.0.70 and 8.x through 8.5.4, when the CGI Servlet is enabled, 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 "A mitigation is planned for future releases of Tomcat, tracked as CVE-2016-5388"; in other words, this is not a CVE ID for a vulnerability. ## Affected - `enterprise_linux_desktop = 7.0` - `enterprise_linux_hpc_node = 7.0` - `enterprise_linux_hpc_node_eus = 7.2` - `enterprise_linux_server = 7.0` - `enterprise_linux_server_aus = 7.2` - `enterprise_linux_server_eus = 7.2` - `enterprise_linux_server_tus = 7.2` - `enterprise_linux_workstation = 7.0` - `system_management_homepage <= 7.5.5.0` - `enterprise_linux_desktop = 6.0` - `enterprise_linux_hpc_node = 6.0` - `enterprise_linux_server = 6.0` - `enterprise_linux_workstation = 6.0` - `linux = 6` - `linux = 7` - `tomcat >= 6.0, <= 6.0.45` - `tomcat >= 7.0, <= 7.0.70` - `tomcat >= 8.0, <= 8.5.4` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.