CVE-2026-49975

CVE-2026-49975 HTTP/2 Bomb PoC HTTP/2 远程拒绝服务漏洞复现工具 漏洞概述 CVE-2026-49975 是一个影响主流 Web 服务器的 HTTP/2 拒绝服务漏洞。该漏洞由安全公司 Calif（使用 OpenAI Codex）于 2026 年 6 月初发现。 攻击原理 1. HPACK 压缩炸弹 ：将极小的 header（如 "x: a"）插入服务器 HPACK 动态表，然后发送成千上万个 1-byte 的索引引用。每个引用迫使服务器分配大量簿记内存，但客户端只消耗极少带宽。内存放大比例可达 5700:1 （Envoy）和 4000:1 （Apac...

CVE-2026-49975

Herramienta de reproducción de la bomba HTTP/2 CVE-2026-49975 Autor : polar bear Versión : 2.1 Vulnerabilidad aplicable : CVE-2026-49975 bomba de memoria del protocolo HTTP/2 📖 Fundamentos de la vulnerabilidad CVE-2026-49975 es una vulnerabilidad de agotamiento de memoria en la implementación del...

CLEANSTART-2026-XZ10656 Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5

Security vulnerability affects the sonarqube package. Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core 5...

http2-bomb

HTTP/2 炸弹 - CVE-2026-49975 一个针对 HTTP/2 服务器的拒绝服务（DoS）概念验证。通过将 HPACK 放大与流保持相结合，一台拥有普通网络连接的机器即可在数秒内使存在漏洞的服务器不可用。 漏洞 CVE： CVE-2026-49975 标题： Apache HTTP Server：modhttp2 拒绝服务 官方描述： Apache HTTP Server 的 modhttp2 模块中存在一个过大内存分配漏洞（CWE-789），允许通过特制的 HTTP 请求发起拒绝服务攻击。 受影响版本： Apache HTTP Server 2.4.17 至 2.4.67...

http2-bomb-analysis-paper

HTTP/2 炸弹：HPACK 索引引用放大链攻击 一名高中生的独立技术深度剖析 2026年6月 TL;DR 本仓库包含我对 HTTP/2 炸弹 漏洞（CVE-2026-49975 / CVE-2026-47774）的完整分析，该漏洞将两个存在二十年的 HTTP/2 原语链接在一起： HPACK 索引引用放大 – 发送数千个单字节引用指向一个近乎空的动态表条目 流控窗口停滞 – 零初始窗口加上周期性1字节 WINDOWUPDATE 永久锁定内存 结果： 一条 100 Mbps 的客户端连接可在短短 10 秒内 耗尽 32 GB 服务器内存 。 🧠 我是如何入坑的 一切始于我在...

Astra Linux – Vulnerability in golang-golang-x-net, golang-1.19

A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, enough to trigger a denial of service due to a small number of small requests...

CVE-2026-49975

CVE-2026-49975 HTTP/2 Bomb ★ CVE-2026-49975 HTTP/2 Bomb PoC ★ https://github.com/user-attachments/assets/89310771-f704-45d1-a6c3-d910de1dbc74 Descripción general CVE-2026-49975 es una vulnerabilidad de Denegación de Servicio DoS en Apache HTTP Server. La vulnerabilidad ocurre en la ruta de manejo...

cve-2026-49975-http2bomb_reproduction

CVE-2026-49975 HTTP/2 Bomb Complete Reproduction Guide Based on QiAnXin CERT Advisory + Calif Original Research ================================================================ I. Vulnerability Overview CVE-2026-49975 is a critical denial-of-service DoS vulnerability in HTTP/2 server and proxy...

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 ...

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 ...

PYSEC-2026-4053 hpack: Unbounded variable integer decoding can cause run-away computation on malformed input

Impact Users of the python-hyper/hpack library, most commonly used as downstream dependency of the python-hyper/h2 library an HTTP/2 client and server implementation. Unbounded variable integer decoding can cause run-away computation on malformed input leading to On^2 runtime, effectively blockin...

hpack: Unbounded variable integer decoding can cause run-away computation on malformed input

ImpactUsers of the python-hyper/hpack library, most commonly used as downstream dependency of the python-hyper/h2 library an HTTP/2 client and server implementation. Unbounded variable integer decoding can cause run-away computation on malformed input leading to On^2 runtime, effectively blocking...

CLEANSTART-2026-GO38541 Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5

Security vulnerability affects the apache-nifi package. Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core 5...

CLEANSTART-2026-YJ27178 hpack is an HTTP/2 Header Encoding for Python

Security vulnerability affects the py3-hpack package. hpack is an HTTP/2 Header Encoding for Python...

AlmaLinux 9.2 [TuxCare] Security Update: haproxy (ALMALINUX9.2:CLSA-2026:1783527210)

The AlmaLinux 9.2 host has a package installed that is affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1783527210 advisory. - HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c...

AlmaLinux 9.6 [TuxCare] Security Update: haproxy (ALMALINUX9.6:CLSA-2026:1782820521)

The AlmaLinux 9.6 host has a package installed that is affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1782820521 advisory. - HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c...

Rocky Linux 8 [CIQ] Security Update: haproxy / haproxy-debuginfo / haproxy-debugsource (crlsa-2026_55859)

The Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-202655859 advisory. haproxy: HAProxy: Denial of Service via HPACK dynamic table insertions CVE-2026-55204 Tenable has extracted the preceding description block directly from the CIQ...

Rocky Linux 10.2 [CIQ] Security Update: haproxy / haproxy-debuginfo / haproxy-debugsource Multiple Vulnerabilities (crlsa-2026_55679)

The Rocky Linux 10.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-202655679 advisory. haproxy: HAProxy: Denial of Service via HPACK dynamic table insertions CVE-2026-55204 haproxy: HAProxy: Response smuggling due to integer overflow in...

Rocky Linux 9 [CIQ] Security Update: haproxy / haproxy-debuginfo / haproxy-debugsource Multiple Vulnerabilities (crlsa-2026_55772)

The Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-202655772 advisory. haproxy: HAProxy: Denial of Service via HPACK dynamic table insertions CVE-2026-55204 haproxy: HAProxy: Response smuggling due to integer overflow in...

PT-2026-105809

Impact Users of the python-hyper/hpack library, most commonly used as downstream dependency of the python-hyper/h2 library an HTTP/2 client and server implementation. Unbounded variable integer decoding can cause run-away computation on malformed input leading to On^2 runtime, effectively blockin...