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CVE-2026-44545

Status: AnalyzedHigh (7.5)—

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.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector CVSS AV:N/AC:L/PR:N/UI:N indica explotación remota sin autenticación (T1190). CWE-770 y descripción explícita de consumo excesivo de memoria por mensajes WebSocket grandes = Denial of Service por agotamiento de recursos (T1499.004).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Affected technologies (1)

Djangoproject — Daphne

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-44545",
  "cveTags": [],
  "metrics": {
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          "options": [
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              "exploitation": "none"
            },
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              "automatable": "yes"
            },
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-06-03T15:48:33.527931Z"
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  "published": "2026-06-03T14:16:43.583",
  "references": [
    {
      "url": "https://github.com/django/daphne/blob/main/CHANGELOG.txt",
      "tags": [
        "Release Notes"
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  "vulnStatus": "Analyzed",
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    },
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    }
  ],
  "lastModified": "2026-07-22T19:10:00.120",
  "configurations": [
    {
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        {
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