{"id":"CVE-2026-44545","aliases":["GHSA-rrc9-mx66-ffcm","PYSEC-2026-213"],"url":"https://o3.security/vulnerability/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.","published":"2026-06-03T13:17:42.907Z","modified":"2026-07-24T03:56:49.136088629Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":{"score":0.00328,"percentile":0.25305,"asOf":"2026-08-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"daphne","fixedVersion":"4.2.2"}],"fix":null,"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/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-24T03:56:49.136088629Z"}}