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Vulnerability Database · PyPI · matrix-synapse · Version

matrix-synapse 1.133.0

1.133.0 is affected by 11 vulnerabilities.

The vulnerabilities that cover this exact version are listed below with the fixed version to move to. The upgrade Vulert recommends: 1.163.0.

Critical 0 High 1 Medium 4 Low 1 Unrated 5

All matrix-synapse versions & vulnerabilities → Source repository Search the database for this package →
Released 01 Jul 2025 Licence AGPL-3.0-or-later Also known from other sources 6 Newer releases 300 Database updated 23/Oct/2026

Release and licence data published by PyPI. Licence information is not legal advice.

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01 Vulnerabilities affecting this version

matrix-synapse 1.133.0 vulnerabilities

11 vulnerabilities cover matrix-synapse 1.133.0. Scroll the table for all of them, or open the full list in the database.

Vulnerability Severity Fixed version Disclosed
CVE-2026-45078: Matrix Synapse CPU Starvation Denial of Service Vulnerability 7.1 high 1.152.1 14 May 2026
CVE-2026-45076: Matrix Synapse Pagination Denial of Service Vulnerability 6.9 medium 1.152.1 14 May 2026
CVE-2026-45078: Matrix Synapse Denial of Service Vulnerability 5.5 medium 1.152.1 28 May 2026
CVE-2025-61672: Matrix Synapse Device Key Validation Vulnerability 5.3 medium 1.138.3 07 Jul 2026
CVE-2025-61672: Matrix-Synapse Device Key Validation Vulnerability 5.3 medium 1.138.3 08 Oct 2025
CVE-2026-45076: matrix-synapse Vulnerability in Federated Rooms Preventing Full History Display 2.7 low 1.152.1 28 May 2026
CVE-2024-31208: Denial of Service Vulnerability in matrix-synapse N/A unrated 55b0aa847a61774b6a3acdc4b177a20dc019f01a 23 Apr 2024
CVE-2021-41281: Arbitrary File Download in matrix-synapse N/A unrated 91f2bd090 23 Nov 2021
CVE-2021-29471: Denial-of-Service Vulnerability in matrix-synapse N/A unrated 03318a766cac9f8b053db2214d9c332a977d226c 11 May 2021
CVE-2021-21273: Open Redirect in matrix-synapse N/A unrated 30fba6210834a4ecd91badf0c8f3eb278b72e746 26 Feb 2021
CVE-2020-26257: Matrix Synapse - Malformed Events Injection N/A unrated 3ce2f303f15f6ac3dc352298972dc6e04d9b7a8b 09 Dec 2020

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Questions

About matrix-synapse 1.133.0

Is matrix-synapse 1.133.0 vulnerable?

Yes. 11 vulnerabilities in the Vulert database cover matrix-synapse 1.133.0: 0 critical, 1 high, 4 medium and 1 low, plus 5 not yet rated. The upgrade Vulert recommends is 1.163.0, and each entry above names the fixed version to move to.

Which version of matrix-synapse should I use instead of 1.133.0?

1.163.0 is the version Vulert recommends for this release line. The version table on the package page lists every release with the vulnerabilities recorded against it.

Is 1.133.0 the latest release of matrix-synapse?

No. 1.133.0 was published 01 Jul 2025, and newer releases exist. Newer is not automatically safer — the version table on the package page shows what each release carries.

How do I monitor matrix-synapse for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the matrix-synapse version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.