EUVD-2026-32934

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...

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...

synapse 安全漏洞

Synapse is an open-source matrix main server developed by Element. Versions prior to 1.152.1 of Synapse contained a security vulnerability. This vulnerability occurred due to locally authenticated users being able to exhaust CPU resources, causing other requests to fail and leading to...

synapse 输入验证错误漏洞

Synapse is an open-source matrix main server developed by Element. Versions prior to 1.152.1 of Synapse contained a vulnerability related to input validation errors. This vulnerability allowed malicious servers to manipulate room events, thereby preventing the complete history from being provided...

GHSA-8Q93-326V-3M7G vulnerabilities

Vulnerabilities for packages: synapse...

GHSA-6QF2-7X63-MM6V vulnerabilities

Vulnerabilities for packages: synapse...

CVE-2026-45078 vulnerabilities

Vulnerabilities for packages: synapse...

CVE-2026-45076 vulnerabilities

Vulnerabilities for packages: synapse...

CVE-2026-42304 vulnerabilities

Vulnerabilities for packages: synapse...

GHSA-GRGV-6HW6-V9G4 vulnerabilities

Vulnerabilities for packages: synapse...

Synapse pagination Denial of Service

Impact 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. Patches Update to Synapse 1.152.1 or later. Workarounds There are no known workaround...

Improper Check for Unusual or Exceptional Conditions

Overview matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP. Affected versions of this package are vulnerable to Improper Check for Unusual or Exceptional Conditions in the pagination process for federated rooms. An attacker can cause clients to fail to display room...

GHSA-6QF2-7X63-MM6V Synapse pagination Denial of Service

Impact 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. Patches Update to Synapse 1.152.1 or later. Workarounds There are no known workaround...

raiden (>=0.100.2 <=0.100.3rc1) potentially affected by CVE-2026-45076 via matrix-synapse (=0.33.9)

matrix-synapse PYPI version =0.33.9 is affected by a known vulnerability. The following packages have a transitive dependency on matrix-synapse and may be impacted: - raiden =0.100.2, =0.100.3rc1 Source cves: CVE-2026-45076 Source advisory: OSV:GHSA-6QF2-7X63-MM6V...

Synapse CPU starvation (Denial of Service)

Impact 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. Homeservers that trust all their local users are not at risk. Patches Update to Synapse 1.152.1 or later. Workarounds If Synapse is...

GHSA-8Q93-326V-3M7G Synapse CPU starvation (Denial of Service)

Impact 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. Homeservers that trust all their local users are not at risk. Patches Update to Synapse 1.152.1 or later. Workarounds If Synapse is...

Asymmetric Resource Consumption (Amplification)

Overview matrix-synapse is an ecosystem for open federated Instant Messaging and VoIP. Affected versions of this package are vulnerable to Asymmetric Resource Consumption Amplification through the handling of authenticated user requests. An attacker can exhaust CPU resources and cause service...

raiden (>=0.100.2 <=0.100.3rc1) potentially affected by CVE-2026-45078 via matrix-synapse (=0.33.9)

matrix-synapse PYPI version =0.33.9 is affected by a known vulnerability. The following packages have a transitive dependency on matrix-synapse and may be impacted: - raiden =0.100.2, =0.100.3rc1 Source cves: CVE-2026-45078 Source advisory: OSV:GHSA-8Q93-326V-3M7G...

PT-2026-41158

Name of the Vulnerable Software and Affected Versions Synapse versions prior to 1.152.1 Description In federated rooms, malicious homeservers can craft room events that prevent the server from providing full history to paginating clients. This can result in clients failing to display the room...

PT-2026-41159

Name of the Vulnerable Software and Affected Versions Synapse versions prior to 1.152.1 Description Local authenticated users can cause the system to starve other requests of CPU resources, leading to request failures and a denial of service for other users. Homeservers that trust all their local...