VULNERABILITY INTELLIGENCE

CVE-2018-10657

CVSS score7.5 HIGH
EPSS probability1.49%
CISA KEVNot currently listed
Published2018-05-02
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py, as exploited in the wild in April 2018.

Weakness classification

  • CWE-20: Improper Input Validation

Primary references