Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.
総合評価: CVE-2020-9490 は高リスク（69.9/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 89.74%、100 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 +13.47% 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 | 76.28% | 89.74% | +13.47% |
| 2 | 2026-05-28 | 72.86% | 76.28% | +3.42% |
| 3 | 2026-05-09 | — | 72.86% | — |
EPSS の全履歴 （全 61 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 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2020-9490: 1 source package rows (apache2); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. | https://security.alpinelinux.org/vuln/CVE-2020-9490 |
debian
|
not yet assigned | CVE-2020-9490 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-2020-9490 |
gentoo
|
normal | CVE-2020-9490: 1 GLSA(s) (202008-04), 1 atom(s) (www-servers/apache); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-9490 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2020-9490 |
suse
|
high | CVE-2020-9490 severity important: SUSE including 296 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 498 product×package rows across 60 product lines (HPE Helion OpenStack 8, Image SLES15-SP3-EC2-HVM, … (60 product lines)): Fixed 264, Known Affected 231, Known Not Affected 3. | https://www.suse.com/security/cve/CVE-2020-9490/ |
ubuntu
|
medium | CVE-2020-9490 medium priority: Ubuntu including 1 source packages (apache2), 5 status rows across 5 suites (bionic, focal, trusty, upstream, xenial): released 3, not-affected 2. | https://ubuntu.com/security/CVE-2020-9490 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| apache | http_server | >= 2.4.20, < 2.4.46 | cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* |
| oracle | communications_element_manager | >= 8.2.0, <= 8.2.2 | cpe:2.3:a:oracle:communications_element_manager:*:*:*:*:*:*:*:* |
| oracle | communications_session_report_manager | >= 8.2.0, <= 8.2.2 | cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:* |
| oracle | communications_session_route_manager | >= 8.2.0, <= 8.2.2 | cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:* |
| oracle | enterprise_manager_ops_center | 12.4.0.0 | cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:* |
| oracle | hyperion_infrastructure_technology | 11.1.2.4 | cpe:2.3:a:oracle:hyperion_infrastructure_technology:11.1.2.4:*:*:*:*:*:*:* |
| oracle | instantis_enterprisetrack | 17.1 | cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:* |
| oracle | instantis_enterprisetrack | 17.2 | cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* |
| oracle | instantis_enterprisetrack | 17.3 | cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:* |
| oracle | zfs_storage_appliance_kit | 8.8 | cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* |
| opensuse | leap | 15.1 | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
| opensuse | leap | 15.2 | cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| fedoraproject | fedora | 31 | cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* |
| fedoraproject | fedora | 32 | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 18.04 | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 20.04 | cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* |
| redhat | software_collections | 1.0 | cpe:2.3:a:redhat:software_collections:1.0:*:*:*:*:*:*:* |
| redhat | openstack | 16.1 | cpe:2.3:a:redhat:openstack:16.1:*:*:*:*:*:*:* |
| redhat | openstack_for_ibm_power | 16.1 | cpe:2.3:a:redhat:openstack_for_ibm_power:16.1:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 8.1 | cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems | 8.0 | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems_eus | 8.1 | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.1:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems_eus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems_eus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_ibm_z_systems_eus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian | 8.0 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian_eus | 8.1 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.1:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian_eus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian_eus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian_eus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.1 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.1:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.2 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.4 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.6 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_update_services_for_sap_solutions | 8.1 | cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.1:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_update_services_for_sap_solutions | 8.2 | cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_update_services_for_sap_solutions | 8.4 | cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_update_services_for_sap_solutions | 8.6 | cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.6:*:*:*:*:*:*:* |