Critical Apache HTTP/2 Flaw (CVE-2026-23918) Enables DoS and Potential RCE

The Apache Software Foundation ASF has released security updates to address several security vulnerabilities in the HTTP Server, including a severe vulnerability that could potentially lead to remote code execution RCE. The vulnerability, tracked as CVE-2026-23918 CVSS score: 8.8, has been...

ALPINE-CVE-2026-23918

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 the issue...

JLSEC-2026-416 When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of...

When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit 1000, libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead lea...

Security Bulletin: IBM Guardium Data Protection is affected by a single vulnerability (CVE-2025-5115)

Summary IBM Guardium Data Protection has addressed this vulnerability in an update. Vulnerability Details CVEID:CVE-2025-5115 DESCRIPTION: In Eclipse Jetty, versions =9.4.57, =10.0.25, =11.0.25, =12.0.21, =12.1.0.alpha2, an HTTP/2 client may trigger the server to send RSTSTREAM frames, for exampl...

SUSE-SU-2026:21272-1 Security update for ignition

This update for ignition fixes the following issue: - CVE-2026-33186: Fixed an authorization bypass due to improper validation of the HTTP/2: path pseudo-header bsc1260251...

Important: Red Hat Security Advisory: nghttp2 security update

An update for nghttp2 is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support. 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 available for...

nghttp2 security update

An update is available for nghttp2. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list libnghttp2 is a library implementing the Hypertext Transfer Protocol version ...

Important: Red Hat Security Advisory: nodejs:22 security update

An update for the nodejs:22 module is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. 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...

Node.js: Node.js: Memory leak and Denial of Service via crafted HTTP/2 WINDOW_UPDATE frames

A flaw was found in Node.js. A remote attacker can exploit this vulnerability in Node.js HTTP/2 servers by sending specially crafted WINDOWUPDATE frames on stream 0 connection-level. These frames can cause the flow control window to exceed its maximum value, leading to a memory leak as Http2Sessi...

nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination

A flaw was found in nghttp2. Due to missing internal state validation, the library continues to process incoming data even after a session has been terminated. A remote attacker could exploit this by sending a specially crafted HTTP/2 frame, leading to an assertion failure and a denial of service...

Important: nghttp2 security update

libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 HTTP/2 protocol in C. Security Fixes: nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination CVE-2026-27135 For more details about the security issues, including the impact, a CVSS...

Security update for ignition

This update for ignition fixes the following issue: CVE-2026-33186: google.golang.org/grpc: authorization bypass due to improper validation of the HTTP/2: path pseudo- header bsc1260251 Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST...

SUSE CVE-2026-26233

Mattermost versions 11.4.x = 11.4.0, 11.3.x = 11.3.1, 11.2.x = 11.2.3, 10.11.x = 10.11.11 fail to rate limit login requests which allows unauthenticated remote attackers to cause denial of service server crash and restart via HTTP/2 single packet attack with 100+ parallel login requests...

DEBIAN-CVE-2026-33871

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, a remote user can trigger a Denial of Service DoS against a Netty HTTP/2 server by sending a flood of CONTINUATION frames. The server's lack of a limit on the number of...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization in the processing of HTTP/2 :path pseudo-headers in handleStream. An attacker can gain unauthorized access to restricted resources by sending requests with malformed :path headers that omit the leading slash. Thi...

CVE-2026-32136

AdGuard Home (network-wide ad/blocking software) contains a authentication bypass vulnerability CVE-2026-32136. Before 0.107.73, an unauthenticated remote attacker can trigger an HTTP/1.1 upgrade to h2c; after the upgrade is accepted, the inner mux handles subsequent HTTP/2 requests without authe...

nodejs: Nodejs denial of service

A denial of service flaw has been discovered in NodeJS. A malformed HTTP/2 HEADERS frame with oversized, invalid HPACK data can cause Node.js to crash by triggering an unhandled TLSSocket error ECONNRESET. Instead of safely closing the connection, the process crashes, enabling a remote denial of...

[SECURITY] [DSA 6120-1] tomcat10 security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6120-1 [email protected] https://www.debian.org/security/ Markus Koschany February 05, 2026 https://www.debian.org/security/faq -...

Amazon Linux 2023 : nodejs24, nodejs24-devel, nodejs24-full-i18n (ALAS2023-2026-1404)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1404 advisory. Bypass File System Permissions using crafted symlinks CVE-2025-55130 A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using th...

Security Bulletin: WebSphere Liberty susceptible to HTTP2 implementation vulnerabilities

Summary There are multiple vulnerabilities in IBM® WebSphere Liberty ,Version 8.5.5.8 used by IBM Tivoli Application Dependency Discovery Manager TADDM Vulnerability Details CVEID:CVE-2019-9515 DESCRIPTION: Multiple vendors are vulnerable to a denial of service, caused by a Settings Flood attack...