CVE-2026-13763

This CVE affects AWS Application Load Balancer (ALB) with AWS WAF enabled, where inconsistent interpretation of HTTP/2 requests can allow bypass of WAF body inspection when the request body is fragmented across frames, leading to partial inspection. Affected component: HTTP/2 ALB target groups; r...

PT-2026-52885

Name of the Vulnerable Software and Affected Versions Envoy versions 1.34.0 through 1.35.12 Envoy versions 1.36.0 through 1.36.8 Envoy versions 1.37.0 through 1.37.4 Envoy versions 1.38.0 through 1.38.2 Description The PROXY Protocol v2 header generator emits Type-Length-Values TLVs that exceed t...

BIT-ENVOY-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...

Astra Linux – Vulnerability in Apache2

A properly crafted method sent via HTTP/2 will bypass validation and be forwarded by modproxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server versions 2.4.17 to 2.4.48...

Astra Linux – Vulnerability in Apache2

Double-free operations and a potential RCE vulnerability exist in the Apache HTTP Server with the HTTP/2 protocol. This issue affects the Apache HTTP Server version 2.4.66. Users are recommended to upgrade to version 2.4.67, as this version fixes the vulnerability...

netty-codec-haproxy: Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers

A flaw was found in the Netty HAProxy PROXY protocol v2 codec. A remote attacker can exploit this vulnerability by sending a specially crafted HAProxy PROXY protocol v2 header with nested PP2TYPESSL type-length-value TLV records. This can lead to a memory leak, causing the underlying cumulation...

netty-codec-haproxy: Netty HAProxy PROXY protocol v2 codec: Denial of Service via memory leak from crafted PROXY protocol headers

A flaw was found in the Netty HAProxy PROXY protocol v2 codec. A remote attacker can exploit this vulnerability by sending a specially crafted HAProxy PROXY protocol v2 header with nested PP2TYPESSL type-length-value TLV records. This can lead to a memory leak, causing the underlying cumulation...

SUSE CVE-2026-48059

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, the HAProxy PROXY protocol v2 codec in netty leaks native or heap memory on every connection when a client sends a syntactically valid header containing nest...

HTTP/2 Exposure Auditor

The script safely evaluates HTTP/2 exposure by negotiating ALPN, initiating a minimal HTTP/2 session, collecting server SETTINGS frames, and identifying potentially permissive protocol configurations. It avoids stream amplification, flooding behavior, connection fan-out, and sustained resource...

GHSA-H2QV-FJ59-J46J Netty HAProxy: Unbalanced Reference Count in Nested PP2_TYPE_SSL TLV Parsing Leads to Memory Exhaustion

Impact The HAProxy PROXY protocol v2 codec in netty leaks native or heap memory on every connection when a client sends a syntactically valid header containing nested PP2TYPESSL TLVs type-length-value records at depth two or greater. The leak occurs on the successful parse path — no exception is...

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...

CVE-2026-10725 Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb

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...

Linux Distros Unpatched Vulnerability : CVE-2026-10725

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Security update for ignition

This update for ignition fixes the following issue CVE-2026-33814: golang.org/x/net/http2: infinite loop in HTTP/2 transport when given bad SETTINGSMAXFRAMESIZE bsc1265751. Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST onlineupdate or...

SUSE-SU-2026:2192-1 Security update for ignition

This update for ignition fixes the following issue - CVE-2026-33814: golang.org/x/net/http2: infinite loop in HTTP/2 transport when given bad SETTINGSMAXFRAMESIZE bsc1265751...

Amazon Linux 2023 : mod_http2 (ALAS2023-2026-1724)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1724 advisory. Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol. This issue affects Apache HTTP Server: 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes...

Astra Linux - уязвимость в tomcat9

Improper handling of exceptional conditions, and uncontrolled resource consumption vulnerabilities in Apache Tomcat. When processing an HTTP/2 stream, Tomcat failed to correctly handle some cases of excessive HTTP headers. This resulted in an incorrect count of active HTTP/2 streams, leading to t...

Vinyl/Varnish -- HTTP/2 parsing deficiency

Vinyl Development Team reports: A deficiency in HTTP/2 request parsing can be exploited to launch a backend request desync attack request smuggling, which in turn can be used for cache poisoning, authentication bypass or possibly even information disclosure and manipulation...

BIT-NGINX-GATEWAY-2026-42926 NGINX ngx_http_proxy_v2_module vulnerability

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxyhttpversion to 2, and also uses proxysetbody, an attacker may be able to inject frame headers and payload bytes to the upstream peer. Note: Software versions which have reached End of Technical Support EoTS are not...

CVE-2026-42926

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxyhttpversion to 2, and also uses proxysetbody, an attacker may be able to inject frame headers and payload bytes to the upstream peer. Note: Software versions which have reached End of Technical Support EoTS are not...