PYSEC-2026-191

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1...

PYSEC-2026-191

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1...

DEBIAN-CVE-2026-45076

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, in federated rooms, malicious homeservers can craft room events in such a way that prevents Synapse from providing full history to paginating clients. Clients could therefore fail to display room history. This...

DEBIAN-CVE-2026-45078

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1...

EUVD-2026-32935

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1...

CVE-2026-45078

CVE-2026-45078 — Synapse CPU starvation (Denial of Service) Affected: Synapse (open source Matrix homeserver) before version 1.152.1. Issue: Local authenticated users can cause CPU starvation among concurrent requests, leading to other requests failing and denial of service for other users. Impac...

CVE-2026-45078

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1...

CVE-2026-45078

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1...

PT-2026-45981

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1...

CVE-2026-42553 Cinny: Access token disclosure via invalidated emoji pack avatar URL in service worker

Cinny is a Matrix client. Prior to 4.10.3, A remote authenticated attacker who shares a room with a victim and has permissions to create room emotes for example in a DM can cause the victim's client to send their Matrix access token to an attacker-controlled server. This occurs when the victim...

Cinny vulnerable to access token disclosure via invalidated emoji pack avatar URL in service worker

Impact A remote authenticated attacker who shares a room with a victim and has permissions to create room emotes for example in a DM can cause the victim's client to send their Matrix access token to an attacker-controlled server. This occurs when the victim opens the emoji or sticker picker for...

GHSA-55CF-XX38-4P9P OpenClaw: Workspace dotenv files cannot override connector endpoint hosts

Summary Workspace dotenv files cannot override connector endpoint hosts. Affected Packages / Versions - Package: openclaw npm - Affected versions: = 2026.4.21 - Fixed version: 2026.4.22 Impact A workspace .env file could set connector endpoint variables for Matrix, Mattermost, IRC, or...

OpenClaw: Workspace dotenv files cannot override connector endpoint hosts

Summary Workspace dotenv files cannot override connector endpoint hosts. Affected Packages / Versions - Package: openclaw npm - Affected versions: = 2026.4.21 - Fixed version: 2026.4.22 Impact A workspace .env file could set connector endpoint variables for Matrix, Mattermost, IRC, or...

Astra Linux - уязвимость в thunderbird

matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. matrix-js-sdk before 34.11.0 is vulnerable to client-side path traversal via crafted MXC URIs. A malicious room member can trigger clients based on the matrix-js-sdk to issue arbitrary authenticated GET requests to the...

Astra Linux - уязвимость в thunderbird

The Matrix JavaScript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker working alongside a malicious home server could create messages that appeared to be sent by another person, without any indication such as a gray shield. Additionally, a sophisticated...

Astra Linux - уязвимость в thunderbird

The Matrix JavaScript SDK is the Matrix Client-Server software development kit SDK for JavaScript. Prior to version 19.7.0, an attacker who cooperated with a malicious home server could interfere with the verification process between two users, substituting their own cross-signed user identity wi...

[SECURITY] Fedora 43 Update: matrix-synapse-1.147.1-1.fc43

Matrix is an ambitious new ecosystem for open federated Instant Messaging and VoIP. Synapse is a reference "homeserver" implementation of Matrix from the core development team at matrix.org, written in Python/Twisted. It is intended to showcase the concept of Matrix and let folks see the spec in...

CVE-2026-28471

OpenClaw version 2026.1.14-1 prior to 2026.2.2, with the Matrix plugin installed and enabled, contain a vulnerability in which DM allowlist matching could be bypassed by exact-matching against sender display names and localparts without homeserver validation. Remote Matrix users can impersonate...

CVE-2026-28471

OpenClaw version 2026.1.14-1 prior to 2026.2.2, with the Matrix plugin installed and enabled, contain a vulnerability in which DM allowlist matching could be bypassed by exact-matching against sender display names and localparts without homeserver validation. Remote Matrix users can impersonate...

EUVD-2026-9917

OpenClaw version 2026.1.14-1 prior to 2026.2.2, with the Matrix plugin installed and enabled, contain a vulnerability in which DM allowlist matching could be bypassed by exact-matching against sender display names and localparts without homeserver validation. Remote Matrix users can impersonate...