CVE-2025-30355Synapse vulnerable to federation denial of service via malformed events

Descripción

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known workarounds are available.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/element-hq/synapse/security/advisories/GHSA-v56r-hwv5-mxg6 Vendor Advisory
• https://github.com/element-hq/synapse/commit/2277df2a1eb685f85040ef98fa21d41aa4cdd389 Patch
• https://github.com/element-hq/synapse/releases/tag/v1.127.1 Release Notes