https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-21T19:35:12.689536+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2023-32323 CVE-2023-32323 — Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites 2026-10-21T19:35:12.708327+00:00

Affected: matrix-org synapse

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disabled are not affected. In versions of Synapse up to and including 1.73, Synapse did not limit the size of `invite_room_state`, meaning that it was possible to create an arbitrarily large invite event. Synapse 1.74 refuses to create oversized `invite_room_state` fields. Server operators should upgrade to Synapse 1.74 or newer urgently.