net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service

A flaw was found in the net/http component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the ReadHeaderTimeout is not correctly applied during this process. This...

CVE-2026-77762

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from...

DEBIAN-CVE-2026-77762

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from...

CVE-2026-86350

Inconsistent interpretation of HTTP/2 requests 'HTTP Request/Response smuggling' vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from...

CVE-2026-86350 Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up

Inconsistent interpretation of HTTP/2 requests 'HTTP Request/Response smuggling' vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from...

CVE-2026-78437 Apache Tomcat: HTTP/2 DoS via malformed request

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially depends on timing cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121. Users are...

EUVD-2026-85227

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from...

CVE-2026-77762

Apache Tomcat is vulnerable to a race condition caused by concurrent execution using a shared resource with improper synchronization. This flaw allows an attacker to inject trailer fields into another HTTP/2 request via a stale HPACK emitter injecting into a recycled pooled request. Affected vers...

CVE-2026-77762 Apache Tomcat: Stale HPACK emitter injects trailers into recycled pooled Request

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from...

CVE-2026-77762

Concurrent Execution using Shared Resource with Improper Synchronization 'Race Condition' vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from...

CVE-2026-71418

A flaw was found in Suricata, a network Intrusion Detection System, Intrusion Prevention System, and Network Security Monitoring engine. Its DNS-over-HTTP/2 processing incorrectly retains previously processed HTTP/2 DATA frame contents. A remote attacker can exploit this by sending multiple craft...

Important: Red Hat Security Advisory: OpenShift Container Platform 4.19.48 security and extras update

Red Hat OpenShift Container Platform release 4.19.48 is now available with updates to packages and images that fix several bugs. This release includes a security update for Red Hat OpenShift Container Platform 4.19. Red Hat Product Security has rated this update as having a security impact of...

CVE-2025-31650

Apache Tomcat 10.1.39 - サービス拒否 DoS このツールは、不正な priority ヘッダーを使用した大規模な非同期HTTP/2リクエストフラッドを実行して、バージョン10.1.10から10.1.39までを実行しているApache Tomcatサーバーの安定性をテストします。 ⚠️ これは厳密に教育および研究目的 のみです。 ❌ 著者は、違法または無許可の使用について一切責任を負いません 。 🧰 機能 ランダム化された不正なHTTP/2 priority ヘッダーを送信 マルチスレッド非同期アーキテクチャ httpx リアルタイムの可用性監視...

cve-2023-44487

CVE-2023-44487 HTTP/2 Rapid Reset このリポジトリには、影響を分析するために完全にテストされていない例がいくつかありますが、私はこの攻撃のコンセプトを実行したいと思いました。多くのストリームを開始し、すぐにRSTSTREAMフレームを送信してMAXCONCURRENTSTREAMSに達するのを避ける。 H2SpaceX 私は、シングルパケット攻撃を悪用するために作成した低レベルHTTP/2ライブラリH2SpaceXを使用しています。 サンプル 2つのサンプルがあります: Example 1 10000個のGETリクエストを送信し、各リクエストの直後にRES...

net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service

A flaw was found in the net/http component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the ReadHeaderTimeout is not correctly applied during this process. This...

CVE-2025-8671

CVE-2025-8671 - PoC DoS lighttpd HTTP/2 著者: @abiyeenzo ⚠️ 警告 このプロジェクトは教育目的のみ で提供されています。第三者サーバーに対するPoCの実行は違法なサイバー攻撃 とみなされ、刑事訴追の対象となる可能性があります。 このスクリプトは、ご自身のテスト環境またはローカルラボでのみ使用してください。 📌 説明 このスクリプトでは以下のことができます: 1. lighttpd サーバーが CVE-2025-8671 （HTTP/2 DoS）の脆弱性の影響を受けるかどうかを確認します。 2. HTTP/2...

net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service

A flaw was found in the net/http component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the ReadHeaderTimeout is not correctly applied during this process. This...

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...

CVE-2026-88004

A flaw was found in Traefik, an open-source HTTP reverse proxy and load balancer. Its entrypoint defenses, designed to sanitize header names, failed to inspect request trailers. This allowed an unauthenticated client to submit malicious header names within HTTP/1.1 chunked or HTTP/2 trailers...

CVE-2026-88008

A flaw was found in Traefik, an open source HTTP reverse proxy and load balancer. A remote unauthenticated attacker can exploit this vulnerability by sending a specially crafted HTTP/2 request that includes specific upgrade headers. If the backend server accepts the upgrade, Traefik enters a raw...