{"id":"CVE-2026-44545","summary":"Unbounded WebSocket message and frame sizes can cause unauthenticated remote denial of service","details":"daphne before 4.2.2 did not pass maxFramePayloadSize or maxMessagePayloadSize to Autobahn's WebSocketServerFactory. Because Autobahn defaults both values to 0 (unlimited), an unauthenticated remote attacker could send arbitrarily large WebSocket messages or frames, causing excessive memory consumption and a denial of service.","aliases":["PYSEC-2026-213"],"modified":"2026-06-18T03:56:04.290057954Z","published":"2026-06-03T13:17:42.907Z","database_specific":{"cna_assigner":"DSF","cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44545.json"},"references":[{"type":"WEB","url":"https://github.com/django/daphne/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44545.json"},{"type":"ADVISORY","url":"https://github.com/django/daphne/blob/main/CHANGELOG.txt"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44545"},{"type":"PACKAGE","url":"https://pypi.org/project/daphne/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/django/daphne","events":[{"introduced":"ce3e7f6156a29a3604ca0130ddaed488fbd2eeda"},{"fixed":"c19f2f4301cc0c26fbf7ed2080eace9e76aec3b6"}],"database_specific":{"extracted_events":[{"introduced":"4.2.0"},{"last_affected":"4.2.1"},{"introduced":"0"},{"fixed":"4.2.2"}],"cpe":"cpe:2.3:a:djangoproject:daphne:*:*:*:*:*:*:*:*","source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["4.2.1","4.2.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-44545.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:L"}]}