CVE-2026-55204

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c that fails to validate the return value of hpackdhtdefrag when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memo...

CVE-2026-47774 Envoy vulnerable to HTTP/2 memory exhaustion via cookie header size bypass and HPACK amplification

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability in Envoy's HTTP/2 downstream request processing allows an unauthenticated remote client to trigger excessive memory consumption, potentiall...

Important: Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.3.4

Red Hat OpenShift Service Mesh 3.3.4 This update has a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE links in the References section. Red Hat OpenShift Service Mesh 3.3....

Important: Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.2.6

Red Hat OpenShift Service Mesh 3.2.6 This update has a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE links in the References section. Red Hat OpenShift Service Mesh 3.2....

Important: Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.9

Red Hat OpenShift Service Mesh 3.1.9 This update has a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE links in the References section. Red Hat OpenShift Service Mesh 3.1....

PT-2026-50708

Name of the Vulnerable Software and Affected Versions HAProxy versions prior to 3.4.0 Description A null pointer dereference occurs in the hpack dht insert function within src/hpack-tbl.c because the return value of hpack dht defrag is not validated when the memory pool is exhausted. An attacker...

Exploit for Memory Allocation with Excessive Size Value in Apache Http_Server

CVE-2026-49975 HTTP/2 Bomb Complete Reproduction Guide Bas...

Exploit for Memory Allocation with Excessive Size Value in Apache Http_Server

http2-bomb-detector HTTP/2 Bomb CVE-2026-49975 Non-destru...

Double Free

Overview Affected versions of this package are vulnerable to Double Free via improper handling of HPACK dynamic table size updates. An attacker can trigger memory corruption and potentially execute arbitrary code by sending a crafted sequence of HTTP/2 HEADERS frames from a malicious server...

CVE-2026-12043

Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remote threat actor operating a server to cause memory corruption on a connecting client application, potentially leading to arbitrary code execution, via a crafted sequence of HTTP/2...

EUVD-2026-36541

Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remote threat actor operating a server to cause memory corruption on a connecting client application, potentially leading to arbitrary code execution, via a crafted sequence of HTTP/2...

FreeBSD : h2o -- HTTP/2 state amplification denial of service (35c57495-2231-4733-a66e-044f3dad8b21)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 35c57495-2231-4733-a66e-044f3dad8b21 advisory. h2o project reports: An HTTP/2 attack can combine HPACK decompression state amplification with stalled...

PT-2026-48949

Name of the Vulnerable Software and Affected Versions aws-c-http versions prior to 0.11.0 Description Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library allows a remote threat actor operating a server to cause memory corruption on a connecting clien...

httpd: httpd: HTTP/2 Remote Denial of Service via compression bomb and Slowloris-style attack

A flaw was found in HTTP/2, affecting various web servers. A remote attacker can exploit this vulnerability by combining an HPACK compression bomb with a zero-byte flow-control window. This technique allows a small amount of data to expand into large memory allocations on the server, which are th...

httpd: httpd: HTTP/2 Remote Denial of Service via compression bomb and Slowloris-style attack

A flaw was found in HTTP/2, affecting various web servers. A remote attacker can exploit this vulnerability by combining an HPACK compression bomb with a zero-byte flow-control window. This technique allows a small amount of data to expand into large memory allocations on the server, which are th...

Security update for perl-Protocol-HTTP2

This update for perl-Protocol-HTTP2 fixes the following issue CVE-2026-10725: denial of service due to absence of inbound HPACK header-list size limit HTTP/2 Bomb attack bsc1267857. Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST onlineupdat...

CVE-2026-10725

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...

CVE-2026-49975

A flaw was found in HTTP/2, affecting various web servers. A remote attacker can exploit this vulnerability by combining an HPACK compression bomb with a zero-byte flow-control window. This technique allows a small amount of data to expand into large memory allocations on the server, which are th...

Exploit for CVE-2026-49975

CVE-2026-49975 — HTTP/2 Bomb PoC !CVEhttps://img.shields...

PT-2026-45945

Name of the Vulnerable Software and Affected Versions Apache HTTP Server versions 2.4.17 through 2.4.67 nginx affected versions not specified Description A flaw in the HTTP/2 implementation allows a remote attacker to cause a denial of service DoS by inducing excessive memory allocation. The...