CVE-2026-45076

Synapse (open source Matrix homeserver) is affected by CVE-2026-45076. In federated rooms, malicious homeservers can craft room events to prevent full history from being provided to paginating clients, causing clients to fail to display room history. The issue is fixed in Synapse 1.152.1 or later...

CVE-2026-45078

CVE-2026-45078 — Synapse CPU starvation (Denial of Service) Affected: Synapse (open source Matrix homeserver) before version 1.152.1. Issue: Local authenticated users can cause CPU starvation among concurrent requests, leading to other requests failing and denial of service for other users. Impac...