https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-06T17:27:55.558132+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/euvd-2026-233766 EUVD-2026-233766 2026-10-06T17:27:55.657148+00:00 EUVD-2026-233766 https://cve.radiocsirt.org/vuln/fkie_cve-2022-31152 fkie_cve-2022-31152 2026-10-06T17:27:55.657183+00:00

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround.

 https://cve.radiocsirt.org/vuln/ghsa-jhjh-776m-4765 GHSA-jhjh-776m-4765 — Denial of service due to incorrect application of event authorization rules 2026-10-06T17:27:55.657219+00:00

Affected: PyPI: matrix-synapse

### Impact

The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.3/rooms/v10/#authorization-rules) which must be checked when determining if an event should be accepted into a room.

In versions of Synapse up to and including v1.61, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers.

### Patches

Administrators of homeservers with federation enabled are advised to upgrade to v1.62.0 or higher.

### Workarounds

* Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`).

### References

* https://github.com/matrix-org/synapse/pull/13087 * https://github.com/matrix-org/synapse/pull/13088

### For more information

If you have any questions or comments about this advisory, e-mail us at [security@matrix.org](mailto:security@matrix.org).

 https://cve.radiocsirt.org/vuln/gsd-2022-31152 gsd-2022-31152 2026-10-06T17:27:55.657257+00:00 gsd-2022-31152 https://cve.radiocsirt.org/vuln/pysec-2022-262 PYSEC-2022-262 2026-10-06T17:27:55.657270+00:00

Affected: PyPI: matrix-synapse

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround.

 https://cve.radiocsirt.org/vuln/ubuntu-cve-2022-31152 UBUNTU-CVE-2022-31152 2026-10-06T17:27:55.657293+00:00

Affected: Ubuntu:Pro:18.04:LTS: matrix-synapse, Ubuntu:Pro:20.04:LTS: matrix-synapse, Ubuntu:Pro:22.04:LTS: matrix-synapse

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround.