{"id":"CVE-2018-1000518","details":"aaugustin websockets version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appear to be exploitable via Sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in 5.","aliases":["GHSA-6g87-ff9q-v847","PYSEC-2018-79"],"modified":"2026-04-11T17:13:55.621026Z","published":"2018-06-26T16:29:01.243Z","related":["SUSE-SU-2023:2783-1","SUSE-SU-2023:2783-2","openSUSE-SU-2024:11280-1","openSUSE-SU-2024:14166-1"],"references":[{"type":"FIX","url":"https://github.com/aaugustin/websockets/pull/407"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python-websockets/websockets","events":[{"introduced":"0"},{"last_affected":"93c7bc1446f1f9e99b0919dceacf84fd92832811"}],"database_specific":{"cpe":"cpe:2.3:a:websockets_project:websockets:4.0:*:*:*:*:python:*:*","source":"CPE_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"4.0"}]}}],"versions":["1.0","2.0","2.1","2.2","2.3","2.4","2.5","2.6","2.7","3.0","3.1","3.2","3.3","3.4","4.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-1000518.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}