CVE-2026-5740

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unauthenticated remote attacker to crash the server process and cause a full service outage for all users v...

CVE-2026-5740 Unauthenticated WebSocket binary frame causes denial of service in Mattermost Server

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unauthenticated remote attacker to crash the server process and cause a full service outage for all users v...

PT-2026-42750

Mattermost versions 11.6.x = 11.6.0, 11.5.x = 11.5.3, 11.4.x = 11.4.4, 10.11.x = 10.11.14 fail to properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unauthenticated remote attacker to crash the server process and cause a full service outage for all users v...

Mattermost 安全漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Vulnerabilities exist in versions of Mattermost 11.6.0 and earlier 11.6.x series, as well as versions prior to 11.5.3 11.5.x series, 11.4.4 and earlier 11.4.x series, and 10.11.14 and earlier 10.11.x...

Unity Linux 20.1060e / 20.1070e Security Update: rubygem-websocket-extensions (UTSA-2026-016659)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016659 advisory. websocket-extensions ruby module prior to 0.1.5 allows Denial of Service DoS via Regex Backtracking. The extension parser may take quadratic time when parsing a head...

CVE-2026-8467

Code Injection vulnerability in phenixdigital phoenixstorybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation. The psb-assign WebSocket event handler in 'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handleevent/3...

CVE-2026-8467 Unauthenticated remote code execution via HEEx template injection in phoenix_storybook playground

Code Injection vulnerability in phenixdigital phoenixstorybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation. The psb-assign WebSocket event handler in 'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handleevent/3...

CVE-2026-8467

Code Injection vulnerability in phenixdigital phoenixstorybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation. The psb-assign WebSocket event handler in 'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handleevent/3...

EEF-CVE-2026-8467 Unauthenticated remote code execution via HEEx template injection in phoenix_storybook playground

Summary Code Injection vulnerability in phenixdigital phoenixstorybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation. The psb-assign WebSocket event handler in...

Astra Linux - уязвимость в ruby-websocket-extensions

The websocket-extensions Ruby module before version 0.1.5 allowed Denial of Service DoS attacks through Regex backtracking. The extension parser could take quadratic time when parsing a header containing an unclosed string parameter value whose content was a repeated two-byte sequence of a...

Astra Linux - уязвимость в tomcat9

Exposure of the HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerabilities in Apache Tomcat. This issue affects Apache Tomcat versions: 11.0.0-M1 through 11.0.21, 10.1.0-M1 through 10.1.54, 9.0.2 through 9.0.117, 8.5.24 through 8.5.100, and 7.0.83 through...

Moderate: Red Hat Security Advisory: qemu-kvm security update

An update for qemu-kvm is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from t...

RHEL 9 : qemu-kvm (RHSA-2026:18772)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:18772 advisory. Kernel-based Virtual Machine KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the...

Moderate: qemu-kvm security update

Kernel-based Virtual Machine KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Security Fixes: qemu-kvm: VNC WebSocket handshake use-after-free CVE-2025-11234 For more...

ALSA-2026:18772 Moderate: qemu-kvm security update

Kernel-based Virtual Machine KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Security Fixes: qemu-kvm: VNC WebSocket handshake use-after-free CVE-2025-11234 For more...

CVE-2026-42544

Granian is a Rust HTTP server for Python applications. From 1.2.0 to 2.7.4, Granian aborts a worker process when an unauthenticated client sends a WebSocket upgrade request whose Sec-WebSocket-Protocol header contains non-ASCII bytes. The crash happens in Granian's WebSocket scope construction...

ws: Uninitialized memory disclosure

Impact The websocket.close implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. Proof of concept js import deepStrictEqual from 'node:assert'; import WebSocket, WebSocketServer from 'ws'; const wss = new WebSocketServer port: 0,...

EUVD-2026-30543

ws: Uninitialized memory disclosure...

-fides-amor-et-lux (=1.0.0), -price-checker (>=1.0.0 <=1.0.5) +35810 more potentially affected by CVE-2026-45736 via ws (>=8.0.0 <=8.20.0)

ws NPM version =8.0.0, =1.0.0, =1.0.0, =1.1.0, =0.1.0, =1.0.0, =0.1.0, =0.1.0, =0.1.0, =1.0.0-beta.3 - 0g-vibekit =0.1.0 - 0g-zksettlement-client =1.0.0 and more Source cves: CVE-2026-45736 Source advisory: OSV:GHSA-58QX-3VCG-4XPX...

GHSA-58QX-3VCG-4XPX ws: Uninitialized memory disclosure

Impact The websocket.close implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. Proof of concept js import deepStrictEqual from 'node:assert'; import WebSocket, WebSocketServer from 'ws'; const wss = new WebSocketServer port: 0,...