Linux Distros Unpatched Vulnerability : CVE-2022-39374

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the sa...

Linux Distros Unpatched Vulnerability : CVE-2024-52815

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allo...

Linux Distros Unpatched Vulnerability : CVE-2024-37303

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and cachi...

Linux Distros Unpatched Vulnerability : CVE-2024-52805

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Synapse is an open-source Matrix homeserver. In Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory...

[SECURITY] Fedora 41 Update: matrix-synapse-1.118.0-4.fc41

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...

Fedora 41 : matrix-synapse (2025-cddcfd6518)

The remote Fedora 41 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-cddcfd6518 advisory. Backport fixes from v1.127.1 Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not teste...

Fedora: Security Advisory (FEDORA-2025-cef83410f7)

The remote host is missing an update for the SPDX-FileCopyrightText: 2025 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

[SECURITY] Fedora 40 Update: matrix-synapse-1.111.1-4.fc40

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...

Fedora 40 : matrix-synapse (2025-cef83410f7)

The remote Fedora 40 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-cef83410f7 advisory. Backport fixes from v1.127.1 Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not teste...

CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

matrix-synapse-1.127.1-1.1 on GA media (moderate)

matrix-synapse-1.127.1-1.1 on GA media Announcement ID: openSUSE-SU-2025:14939-1 Rating: moderate Cross-References: CVE-2025-30355 Affected Products: openSUSE Tumbleweed An update that solves one vulnerability can now be installed. Description: These are all security issues fixed in the...

SUSE CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

OPENSUSE-SU-2025:14939-1 matrix-synapse-1.127.1-1.1 on GA media

These are all security issues fixed in the matrix-synapse-1.127.1-1.1 package on the GA media of openSUSE Tumbleweed...

Denial-of-Service (DoS)

Synapse is vulnerable to a Denial-Of-Service. The vulnerability is due to improper handling of maliciously crafted federation events, where a malicious Matrix server can send crafted events that prevent Synapse from federating with other servers...

GHSA-V56R-HWV5-MXG6 Synapse vulnerable to federation denial of service via malformed events

Impact A malicious server can craft events with a depth outside the integer range allowed by Canonical JSON. When such an event is received by Synapse version up to 1.127.0, it prevents it from federating with other servers. The vulnerability has been exploited in the wild. Patches Fixed in Synap...

Improper Input Validation

Overview matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP. Affected versions of this package are vulnerable to Improper Input Validation. A malicious server can disrupt the normal operation and prevent the application from federating with other servers by crafting even...

Synapse vulnerable to federation denial of service via malformed events

Impact A malicious server can craft events with a depth outside the integer range allowed by Canonical JSON. When such an event is received by Synapse version up to 1.127.0, it prevents it from federating with other servers. The vulnerability has been exploited in the wild. Patches Fixed in Synap...

CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

DEBIAN-CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...

UBUNTU-CVE-2025-30355

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known...