Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.
総合評価: CVE-2019-9516 は高リスク（65.6/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 57.46%、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 +55.33% 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 | 2.13% | 57.46% | +55.33% |
| 2 | 2026-05-29 | 2.17% | 2.13% | -0.04% |
| 3 | 2026-03-25 | — | 2.17% | — |
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 |
|---|---|---|---|---|---|---|
| 6.5 | 3.1 | MEDIUM |
|
2.8 | 3.6 | [email protected] |
| 7.5 | 3.0 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 6.8 | 2.0 | MEDIUM |
|
8.0 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2019-9516: 2 source package rows (nginx, nodejs); 20 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 20, open 0. | https://security.alpinelinux.org/vuln/CVE-2019-9516 |
debian
|
not yet assigned | CVE-2019-9516 not yet assigned priority: Debian including 1 source packages (nginx), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2019-9516 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2019-9516 |
suse
|
low | CVE-2019-9516 severity low: SUSE including 126 source package names (MozillaFirefox-68.2.0-78.51.4, MozillaFirefox-branding-SLED-68-21.9.8, …), 258 product×package rows across 23 product lines (SUSE Liberty Linux 8, SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP3, … (23 product lines)): Fixed 242, Known Not Affected 16. | https://www.suse.com/security/cve/CVE-2019-9516/ |
ubuntu
|
medium | CVE-2019-9516 medium priority: Ubuntu including 1 source packages (nginx), 6 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): released 3, ignored 1, needs-triage 1, not-affected 1. | https://ubuntu.com/security/CVE-2019-9516 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| apple | swiftnio | >= 1.0.0, <= 1.4.0 | cpe:2.3:a:apple:swiftnio:*:*:*:*:*:*:*:* |
| apache | traffic_server | >= 6.0.0, <= 6.2.3 | cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:* |
| apache | traffic_server | >= 7.0.0, <= 7.1.6 | cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:* |
| apache | traffic_server | >= 8.0.0, <= 8.0.3 | cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 18.04 | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 19.04 | cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| fedoraproject | fedora | 30 | cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* |
| synology | skynas | — | cpe:2.3:a:synology:skynas:-:*:*:*:*:*:*:* |
| synology | diskstation_manager | 6.2 | cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:* |
| synology | vs960hd_firmware | — | cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:* |
| fedoraproject | fedora | 29 | cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* |
| fedoraproject | fedora | 32 | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* |
| opensuse | leap | 15.0 | cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* |
| opensuse | leap | 15.1 | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
| redhat | jboss_core_services | 1.0 | cpe:2.3:a:redhat:jboss_core_services:1.0:*:*:*:*:*:*:* |
| redhat | jboss_enterprise_application_platform | 7.2.0 | cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.2.0:*:*:*:*:*:*:* |
| redhat | jboss_enterprise_application_platform | 7.3.0 | cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.3.0:*:*:*:*:*:*:* |
| redhat | openshift_service_mesh | 1.0 | cpe:2.3:a:redhat:openshift_service_mesh:1.0:*:*:*:*:*:*:* |
| redhat | quay | 3.0.0 | cpe:2.3:a:redhat:quay:3.0.0:*:*:*:*:*:*:* |
| redhat | software_collections | 1.0 | cpe:2.3:a:redhat:software_collections:1.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| oracle | graalvm | 19.2.0 | cpe:2.3:a:oracle:graalvm:19.2.0:*:*:*:enterprise:*:*:* |
| mcafee | web_gateway | >= 7.7.2.0, < 7.7.2.24 | cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:* |
| mcafee | web_gateway | >= 7.8.2.0, < 7.8.2.13 | cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:* |
| mcafee | web_gateway | >= 8.1.0, < 8.2.0 | cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:* |
| f5 | nginx | >= 1.9.5, < 1.16.1 | cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* |
| f5 | nginx | >= 1.17.0, <= 1.17.2 | cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* |
| nodejs | node.js | >= 8.0.0, < 8.16.1 | cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* |
| nodejs | node.js | >= 10.0.0, < 10.16.3 | cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* |
| nodejs | node.js | >= 12.0.0, < 12.8.1 | cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* |