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.
総合評価: CVE-2016-5387 は高リスク（72/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 55.72%、99 パーセンタイル） 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 直近 1 日で EPSS が +11.79% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 43.94% | 55.72% | +11.79% |
| 2 | 2026-06-09 | 51.56% | 43.94% | -7.63% |
| 3 | 2026-06-01 | — | 51.56% | — |
EPSS の全履歴 （全 53 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 8.1 | 3.1 | HIGH |
|
2.2 | 5.9 | [email protected] |
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2016-5387 not yet assigned priority: Debian including 1 source packages (apache2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2016-5387 |
gentoo
|
normal | CVE-2016-5387: 1 GLSA(s) (201701-36), 1 atom(s) (www-servers/apache); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-5387 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2016-5387 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2016-5387/ |
ubuntu
|
medium | CVE-2016-5387 medium priority: Ubuntu including 1 source packages (apache2), 5 status rows across 5 suites (precise, trusty, upstream, wily, xenial): released 4, needs-triage 1. | https://ubuntu.com/security/CVE-2016-5387 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| apache | http_server | >= 2.2.0, <= 2.2.31 | cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* |
| apache | http_server | >= 2.4.1, <= 2.4.23 | cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* |
| hp | system_management_homepage | <= 7.5.5.0 | cpe:2.3:a:hp:system_management_homepage:*:*:*:*:*:*:*:* |
| oracle | communications_user_data_repository | >= 10.0.0, <= 12.4 | cpe:2.3:a:oracle:communications_user_data_repository:*:*:*:*:*:*:*:* |
| oracle | enterprise_manager_ops_center | 12.2.2 | cpe:2.3:a:oracle:enterprise_manager_ops_center:12.2.2:*:*:*:*:*:*:* |
| oracle | enterprise_manager_ops_center | 12.3.2 | cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.2:*:*:*:*:*:*:* |
| oracle | linux | 5 | cpe:2.3:o:oracle:linux:5:-:*:*:*:*:*:* |
| oracle | linux | 6 | cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:* |
| oracle | linux | 7 | cpe:2.3:o:oracle:linux:7:-:*:*:*:*:*:* |
| oracle | solaris | 11.3 | cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:* |
| fedoraproject | fedora | 23 | cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:* |
| fedoraproject | fedora | 24 | cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:* |
| redhat | jboss_web_server | 2.1.0 | cpe:2.3:a:redhat:jboss_web_server:2.1.0:*:*:*:*:*:*:* |
| redhat | jboss_enterprise_web_server | 2.0.0 | cpe:2.3:a:redhat:jboss_enterprise_web_server:2.0.0:*:*:*:*:*:*:* |
| redhat | jboss_enterprise_web_server | 3.0.0 | cpe:2.3:a:redhat:jboss_enterprise_web_server:3.0.0:*:*:*:*:*:*:* |
| redhat | jboss_core_services | 1.0 | cpe:2.3:a:redhat:jboss_core_services:1.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 6.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_desktop | 7.0 | cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.2 | cpe:2.3:o:redhat:enterprise_linux_eus:7.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_eus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.5 | cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.6 | cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 7.7 | cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 6.0 | cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server | 7.0 | cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.2 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.6 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 7.7 | cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.2 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.3 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.6 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 7.7 | cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 6.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_workstation | 7.0 | cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 15.10 | cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* |
| opensuse | leap | 42.1 | cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.2 | cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* |