{"id":"DEBIAN-CVE-2018-10657","details":"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in the wild in April 2018.","modified":"2026-08-11T20:02:58.642639637Z","published":"2018-05-02T16:29:00.233Z","withdrawn":"2026-08-11T20:02:58.642639382Z","upstream":["CVE-2018-10657"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2018-10657"}],"affected":[{"package":{"name":"matrix-synapse","ecosystem":"Debian:14","purl":"pkg:deb/debian/matrix-synapse?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.28.1+dfsg-1"}]}],"versions":["0.19.2+dfsg-3","0.19.2+dfsg-4","0.19.2+dfsg-5","0.19.2+dfsg-6","0.24.0+dfsg-1","0.27.2+dfsg-1","0.28.0+dfsg-1","0.28.0+dfsg-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2018-10657.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}