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...

Unbounded Memory Consumption

Http4s is vulnerable to unbounded memory consumption. The vulnerability is due to HTTP/2 header blocks and CONTINUATION fragments being buffered without a size limit, which allows a remote attacker to keep an incomplete header block open and exhaust heap memory, potentially causing denial of...

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...

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

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-2026-59980: Uncontrolled Resource Consumption

hpack is an HTTP/2 Header Encoding for Python. Prior to version 4.2.0, unbounded variable integer decoding can cause run-away computation on malformed input leading to On^2 runtime, effectively blocking further processing with large enough unsanitized input. A fix is available in python-hyper/hpa...

CVE-2026-86350: Inconsistent Interpretation of HTTP Requests

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...

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...

SUSE CVE-2026-93492

A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAXHEADERTABLESIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimatel...

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...

Denial-Of-Service (DoS)

Http4s is vulnerable to a denial-of-service DoS. The vulnerability is due to an unbounded outbound queue that can accumulate HTTP/2 acknowledgments and WINDOWUPDATE frames when the peer stops reading, which allows an unauthenticated attacker to exhaust server heap memory by sending PING, SETTINGS...

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...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: httpd (UTSA-2026-090049)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-090049 advisory. HTTP/2 2.4.20 through 2.4.39 very early pushes, for example configured with H2PushResource, could lead to an overwrite of memory in the pushing request's pool, leadi...

Node.js 22.x < 22.23.2 / 24.x < 24.18.1 / 26.x < 26.5.1 Multiple Vulnerabilities (Wednesday, July 29, 2026 Security Releases)

The version of Node.js used within the Brocade SANnav is not affected, but does contain the vulnerable code for the following vulnerabilities as referenced in the Wednesday, July 29, 2026 Security Releases advisory. A flaw in Node.js allows a spoofed TypedArray byteLength to trigger a reachable...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: httpd (UTSA-2026-090052)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-090052 advisory. In Apache HTTP Server 2.4.18-2.4.39, using fuzzed network input, the http/2 session handling could be made to read memory after being freed, during connection...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: httpd (UTSA-2026-090046)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-090046 advisory. A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgra...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: haproxy (UTSA-2026-090137)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-090137 advisory. In hpackdhtinsert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can write arbitrary bytes around a certain location ...