Proof-of-Concept-POC---CVE-2026-49975-HTTP-2-Bomb-

CVE-2026-49975 - HTTP/2 Bomb 概念実証 説明 CVE-2026-49975（別名 HTTP/2 Bomb ）は、ほとんどの主要なWebサーバーのデフォルトのHTTP/2設定に影響を与えるリモートサービス拒否（DoS）脆弱性です。 この脆弱性は、OpenAI Codex によって、10年前から知られている2つの技術を組み合わせて発見されました： HPACK Bomb : ネットワーク上の1バイトがサーバー上で完全なヘッダー割り当てに変換されます Slowloris式ホールド : メモリ解放を防ぐゼロバイトのフロー制御ウィンドウ 影響を受けるサーバー サーバー|...

cve-2026-49975-http2bomb_reproduction

CVE-2026-49975（HTTP/2 Bomb）完全再現ガイド 奇安信（QiAnXin）CERT アドバイザリ + Calif オリジナル研究に基づく ================================================================ I. 脆弱性の概要 CVE-2026-49975 は、HTTP/2 サーバーおよびプロキシ実装における重大なサービス拒否（DoS）脆弱性です。「HTTP/2 Bomb」または「HPACK Bomb」と呼ばれるこの攻撃は、HTTP/2 プロトコルの 2...

GHSA-CJCG-CXMH-9WCR Praxis affected by HTTP/2 Bomb

Summary Multiple denial-of-service vulnerabilities have been discovered in HTTP/2 server implementations. All have been rated with a severity impact of Important. The vulnerabilities target HPACK, the header compression scheme in HTTP/2, where a small request can trigger large memory allocations ...

CVE-2026-49975-HTTP-2-Bomb

CVE-2026-49975 —「HTTP/2 Bomb」にさらされた攻撃対象領域を特定するためのトリアージ （悪用ではない）ツールです。 ⚠️ このスクリプトは攻撃ペイロードを送信しません 。通常のHTTPリクエストのみを行い、レスポンスヘッダーを分析して、手動でのバージョン/パッチ確認が必要なホストをフラグ付けします。 CVE-2026-49975 について 2026年6月3日に公開された「HTTP/2 Bomb」は、HPACK圧縮爆弾とSlowlorisスタイルのホールドを組み合わせた未認証のリモートDoSであり、デフォルトのHTTP/2設定でnginx、Apache...

CentOS Linux 8.5 [TuxCare] Security Update: nginx / nginx-all-modules / nginx-filesystem / etc (CENTOS8.5:CLSA-2026:1782317575)

The CentOS Linux 8.5 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS8.5:CLSA-2026:1782317575 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP...

CentOS Linux 6 [TuxCare] Security Update: nginx / nginx-all-modules / nginx-filesystem / nginx-mod-http-geoip / etc (CENTOS6:CLSA-2026:1783633126)

The CentOS Linux 6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS6:CLSA-2026:1783633126 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP request...

AlmaLinux 9.6 [TuxCare] Security Update: nginx / nginx-all-modules / nginx-core / nginx-filesystem / etc (ALMALINUX9.6:CLSA-2026:1781511735)

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1781511735 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP...

CentOS Linux 8.4 [TuxCare] Security Update: nginx / nginx-all-modules / nginx-filesystem / etc (CENTOS8.4:CLSA-2026:1782317138)

The CentOS Linux 8.4 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS8.4:CLSA-2026:1782317138 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP...

Rocky Linux 9.6 [TuxCare] Security Update: nginx / nginx-all-modules / nginx-core / nginx-filesystem / etc (ALMALINUX9.6:CLSA-2026:1781511735)

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1781511735 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP...

AlmaLinux 9.6 [TuxCare] Security Update: mod_http2 (ALMALINUX9.6:CLSA-2026:1781259837)

The AlmaLinux 9.6 host has a package installed that is affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1781259837 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP...

CentOS Linux 7 [TuxCare] Security Update: nginx / nginx-all-modules / nginx-filesystem / nginx-mod-devel / etc (CENTOS7:CLSA-2026:1783791996)

The CentOS Linux 7 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS7:CLSA-2026:1783791996 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP request...

Rocky Linux 9.6 [TuxCare] Security Update: mod_http2 (ALMALINUX9.6:CLSA-2026:1781259837)

The Rocky Linux 9.6 host has a package installed that is affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1781259837 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP...

CentOS Linux 8 [TuxCare] Security Update: nginx / nginx-all-modules / nginx-filesystem / etc (CENTOS-STREAM8:CLSA-2026:1782317620)

The CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS- STREAM8:CLSA-2026:1782317620 advisory. - Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's modhttp leads to denial of service via malicious HTTP...

CVE-2026-49975

CVE-2026-49975 HTTP/2 ボム ★ CVE-2026-49975 HTTP/2 ボム PoC ★ 概要 CVE-2026-49975 は Apache HTTP Server における Denial of Service DoS 脆弱性です。 この脆弱性は HTTP/2 のリクエスト処理経路で発生し、複数の cookie ヘッダーフィールドが LimitRequestFields に対して適切にカウントされずにマージされる可能性があります。 攻撃者は、小さな HPACK エンコードされた HTTP/2 リクエストを送信することで、多くの cookie...

http2-bomb-detector

http2-bomb-detector HTTP/2 Bomb CVE-2026-49975 非破壊的脆弱性検出ツール — Nginx / Apache httpd 向け 脆弱性の背景 CVE-2026-49975 は、広範囲に影響を及ぼす HTTP/2 プロトコル層のリモートサービス拒否脆弱性であり、セキュリティ研究者の Quang Luong によって発見されました。この脆弱性は HPACK ヘッダー圧縮 と フロー制御メカニズム の組み合わせによる設計上の欠陥を悪用し、攻撃者は認証なしで 10～20 秒以内にサーバーの 32GB メモリを枯渇させることができます。 CVSS 3.1...

nginx:1.26 security update

1.26.3-9.4.0.1 - Require oracle-indexhtml 2:1.26.3-14 - Fixes CVE-2026-42533 2:1.26.3-13 - Fixes CVE-2026-56434 and CVE-2026-60005 2:1.26.3-12 - Resolves: RHEL-191774 - nginx: 'HTTP/2 bomb' nginx fix breaks module ABI causing crashes 2:1.26.3-11 - nginx:1.26/nginx: HTTP/2: Remote Denial of Servic...

nginx:1.26 security update

1.26.3-9.0.1.3 - Require oracle-indexhtml 2:1.26.3-13 - Fixes CVE-2026-56434 and CVE-2026-60005 2:1.26.3-12 - Resolves: RHEL-191774 - nginx: 'HTTP/2 bomb' nginx fix breaks module ABI causing crashes 2:1.26.3-11 - nginx:1.26/nginx: HTTP/2: Remote Denial of Service via compression bomb and...

nginx security update

1.26.3-6.0.1.el102.6 - Reference oracle-indexhtml within Requires Orabug: 33802044 2:1.26.3-6.6 - Resolves: RHEL-219313 - nginx: NGINX: Heap buffer over-read allows memory modification or denial of service CVE-2026-56434 - Resolves: RHEL-217956 - nginx: NGINX: Memory disclosure and denial of...

HTTP/2 Bomb CVE-2026-49975

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CVE-2026-10725: Improper Handling of Highly Compressed Data (Data Amplification)

Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb. Protocol::HTTP2's inbound HPACK path has no header-list size limit, so a small HTTP/2 request can expand into large server memory the "HTTP/2 bomb". The headersdecode method materialises a full key+value copy per indexe...