PYSEC-2026-213

Vulnerability from pysec - Published: 2026-06-03 14:16 - Updated: 2026-06-16 12:25
VLAI
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.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impacted products
Name purl
daphne pkg:pypi/daphne
Aliases
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "daphne",
        "purl": "pkg:pypi/daphne"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0",
        "0.10.1",
        "0.10.2",
        "0.10.3",
        "0.11.0",
        "0.11.1",
        "0.11.2",
        "0.11.3",
        "0.12.0",
        "0.12.1",
        "0.12.2",
        "0.13.0",
        "0.13.1",
        "0.14.0",
        "0.14.1",
        "0.14.2",
        "0.14.3",
        "0.15.0",
        "0.8.1",
        "0.8.2",
        "0.9",
        "0.9.1",
        "0.9.2",
        "0.9.3",
        "1.0.0",
        "1.0.1",
        "1.0.2",
        "1.0.3",
        "1.1.0",
        "1.2.0",
        "1.3.0",
        "1.4.0",
        "1.4.1",
        "1.4.2",
        "2.0.0",
        "2.0.1",
        "2.0.2",
        "2.0.3",
        "2.0.4",
        "2.1.0",
        "2.1.1",
        "2.1.2",
        "2.2.0",
        "2.2.1",
        "2.2.2",
        "2.2.3",
        "2.2.4",
        "2.2.5",
        "2.3.0",
        "2.4.0",
        "2.4.1",
        "2.5.0",
        "3.0.0",
        "3.0.1",
        "3.0.2",
        "4.0.0",
        "4.0.0b1",
        "4.1.0",
        "4.1.1",
        "4.1.2",
        "4.2.0",
        "4.2.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44545"
  ],
  "details": "daphne before 4.2.2 did not pass maxFramePayloadSize or maxMessagePayloadSize to Autobahn\u0027s 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.",
  "id": "PYSEC-2026-213",
  "modified": "2026-06-16T12:25:42.094524Z",
  "published": "2026-06-03T14:16:43.583Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/django/daphne/blob/main/CHANGELOG.txt"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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