CVE-2026-73890

Vulnerability in the Helidon product of Oracle Fusion Middleware component: Imperative Web Server. Supported versions that are affected are 4.0.0-4.4.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of thi...

EUVD-2026-62131

Vulnerability in the Helidon product of Oracle Fusion Middleware component: Imperative Web Server. The supported version that is affected is 4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this...

CVE-2026-73887

Vulnerability in the Helidon product of Oracle Fusion Middleware component: Imperative Web Server. Supported versions that are affected are 4.0.0-4.4.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of thi...

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...

Important: Red Hat Security Advisory: mod_http2 security update

An update for modhttp2 is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

Apache Tomcat: Apache Tomcat: Improper Input Validation allows HTTP/2 no-authority bypass of strict SNI validation

A flaw was found in Apache Tomcat. This improper input validation vulnerability, stemming from an incomplete fix for CVE-2026-32990, allows for an HTTP/2 no-authority bypass of strict Server Name Indication SNI validation. This could potentially lead to unauthorized access or misrouting of reques...

org.apache.tomcat/tomcat: Apache Tomcat: Denial of Service via HTTP/2 allocation leak

A flaw was found in Apache Tomcat. This vulnerability, an uncontrolled resource consumption issue, arises from an allocation leak in the HTTP/2 backlog tracking when a stream is reset. A remote attacker could exploit this to cause a Denial of Service DoS, making the server unresponsive or...

RLSA-2026:55804 Moderate: nghttp2 security update

libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 HTTP/2 protocol in C. Security Fixes: nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests CVE-2026-58055 For more details about the security issues,...

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...

PT-2026-78176

Vulnerability in the Helidon product of Oracle Fusion Middleware component: Imperative Web Server. The supported version that is affected is 4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this...

PT-2026-78223

Vulnerability in the Helidon product of Oracle Fusion Middleware component: Imperative Web Server. The supported version that is affected is 4.5.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this...

RHEL 9 : mod_http2 (RHSA-2026:55992)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:55992 advisory. The modh2 Apache httpd module implements the HTTP2 protocol h2+h2c on top of libnghttp2 for httpd 2.4 servers. Security Fixes: modhttp2:...

PT-2026-78225

Name of the Vulnerable Software and Affected Versions Oracle Fusion Middleware Helidon version 4.5.0 Description A flaw in the Imperative Web Server component allows an unauthenticated attacker with network access via HTTP/2 to compromise the system. This can lead to a complete Denial of Service...

PT-2026-78222

Vulnerability in the Helidon product of Oracle Fusion Middleware component: Imperative Web Server. The supported version that is affected is 3.2.19. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this...

RHEL 9 : mod_http2 (RHSA-2026:55930)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:55930 advisory. The modh2 Apache httpd module implements the HTTP2 protocol h2+h2c on top of libnghttp2 for httpd 2.4 servers. Security Fixes: modhttp2:...

KLA91234 SB vulnerabilities in Apache Tomcat

Security bypass vulnerabilities were found in Apache Tomcat. Malicious users can exploit these vulnerabilities to bypass security restrictions. Below is a complete list of vulnerabilities: 1. Security vulnerability can be exploited to bypass security restrictions. 2. Security vulnerability in...

MiracleLinux 9 : dotnet9.0-9.0.119-1.el9_8.ML.1 (AXSA:2026-1557:15)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1557:15 advisory. dotnet: SocketsHttpHandler Http2Connection - HTTP/2 SETTINGS/PING ACK flood causing OOM CVE-2026-50651 dotnet: .NET Core: Denial of Service via type...

PT-2026-78185

Vulnerability in the Helidon product of Oracle Fusion Middleware component: Imperative Web Server. The supported version that is affected is 4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this...

PT-2026-78179

Vulnerability in the Helidon product of Oracle Fusion Middleware component: Imperative Web Server. The supported version that is affected is 4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this...

Important: Red Hat Security Advisory: haproxy security update

An update for haproxy is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...