{"id":"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.","aliases":["GHSA-vmcc-4p4x-x7wg"],"modified":"2026-04-11T17:14:53.695560Z","published":"2018-05-02T16:29:00.233Z","references":[{"type":"ADVISORY","url":"https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1/"},{"type":"FIX","url":"https://github.com/matrix-org/synapse/commit/33f469ba19586bbafa0cf2c7d7c35463bdab87eb"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/matrix-org/synapse","events":[{"introduced":"0"},{"fixed":"8e6bd0e32456e66ec8df3af62ecacf291cf4632f"},{"fixed":"33f469ba19586bbafa0cf2c7d7c35463bdab87eb"}],"database_specific":{"cpe":"cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*","source":["CPE_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"0.28.1"}]}}],"versions":["v0.10.0","v0.10.0-r1","v0.10.0-r2","v0.11.0","v0.11.0-r1","v0.11.0-r2","v0.11.1","v0.12.0","v0.13.1","v0.13.2","v0.13.3","v0.14.0","v0.16.0","v0.16.1","v0.16.1-r1","v0.17.0","v0.17.1","v0.17.2","v0.17.3","v0.18.0","v0.18.1","v0.18.2","v0.18.3","v0.18.4","v0.18.5","v0.2.0","v0.2.1","v0.2.1a","v0.2.2","v0.23.0-rc1","v0.23.0-rc2","v0.25.0-rc1","v0.28.0","v0.28.0-rc1","v0.3.0","v0.3.3","v0.3.4","v0.4.1","v0.4.2","v0.5.0","v0.5.1","v0.5.2","v0.5.3","v0.5.3a","v0.5.3b","v0.5.3c","v0.5.4","v0.5.4a","v0.6.0","v0.6.0a","v0.6.0b","v0.6.1","v0.6.1a","v0.6.1b","v0.6.1c","v0.6.1d","v0.6.1e","v0.6.1f","v0.7.0","v0.7.0a","v0.7.0b","v0.7.0c","v0.7.0d","v0.7.0e","v0.7.0f","v0.7.1","v0.7.1-r1","v0.7.1-r2","v0.7.1-r3","v0.7.1-r4","v0.8.0","v0.8.1","v0.8.1-r1","v0.8.1-r2","v0.8.1-r3","v0.8.1-r4","v0.9.0","v0.9.0-r1","v0.9.0-r2","v0.9.0-r3","v0.9.0-r4","v0.9.0-r5","v0.9.1","v0.9.2","v0.9.2-r1","v0.9.2-r2","v0.9.3"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/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"}]}