Executive brief
Synapse vulnerable to federation denial of service via malformed events
Affected products
- PyPI matrix-synapse
Junglewise Threat Intelligence
CVE-2025-30355: PYSEC-2026-1614 - Synapse vulnerable to federation denial of service via malformed events
CVE-2025-30355 · Severity: low · CVSS 3.1 · Published 2026-07-07
Technologies: matrix-synapse (PyPI). Vendors: PyPI.
Related threats
- PYSEC-2026-2620 - matrix-sydent and matrix-synapse Use Cryptographically Weak PRNG
- PYSEC-2026-1612 - Synapse's invalid device keys degrade federation functionality
- PYSEC-2026-1610 - Synapse Matrix has a partial room state leak via Sliding Sync
- PYSEC-2026-1615 - Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decoders
- PYSEC-2026-1611 - Synapse allows a a malformed invite to break the invitee's `/sync`