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matrix-synapse 1.150.0: known vulnerabilities

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Vulnerabilities: 2

  1. CVE-2026-45078

    Medium · CVSS 6.8EPSS 0.13%Fix available

    Synapse CPU starvation (Denial of Service)

    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.

    • Update to 1.152.1
    Published Updated
  2. CVE-2026-45076

    Medium · CVSS 5.1EPSS 0.37%Fix available

    Synapse pagination denial of service

    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 vulnerability is fixed in 1.152.1.

    • Update to 1.152.1
    Published Updated

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