GHSA-WFQ4-36M3-9G42 Matrix Rust SDK: Sender-binding gaps in to-device and room-key attribution

Impact The matrix-sdk-crypto crate before 0.16.1 is missing a check for the sender's user ID when decrypting an Olm-encrypted to-device message containing the senderdevicekeys property. This could be exploited to spoof the sender of an encrypted to-device message, but only if the attacker collude...

RUSTSEC-2026-0159 Sender-binding gaps in to-device messages

The matrix-sdk-crypto crate before 0.16.1 is missing a check for the sender's user ID when decrypting an Olm-encrypted to-device message containing the senderdevicekeys property. This could be exploited to spoof the sender of an encrypted to-device message, but only if the attacker colludes with ...

RUSTSEC-2026-0158 Incomplete message edit validation in matrix-sdk-ui

The message edit validation logic in the matrix-sdk-ui crate before 0.16.1 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrator or an actor with equivalent power to impersonate or spo...

PT-2026-46305

Name of the Vulnerable Software and Affected Versions matrix-sdk-crypto versions prior to 0.16.1 Description The matrix-sdk-crypto crate fails to verify the sender's user ID during the decryption of Olm-encrypted to-device messages that include the sender device keys property. This flaw allows an...

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...

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-2026-45078

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...

Astra Linux - уязвимость в thunderbird

matrix-js-sdk is a client-server SDK for the Matrix messaging protocol, designed for JavaScript. Version 34.11.0 and earlier of matrix-js-sdk was vulnerable to client-side path traversal attacks through crafted MXC URIs. A malicious room member could trigger clients using matrix-js-sdk to send...

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

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...