CVE catalog

CVE-2026-44546

daphne before 4.2.2 reconstructs a raw HTTP request…

[CVE catalog]

daphne before 4.2.2 reconstructs a raw HTTP request from Twisted's parsed headers and feeds it to autobahn for WebSocket handshake processing. Twisted does not treat \x0b, \x0c, \x1c, \x1d, \x1e, or \x85 as header line separators, but autobahn decodes header values to str and calls splitlines(). An attacker can exploit this parser differential to inject additional headers into the ASGI scope passed to the application. daphne now rejects requests with these bytes in any header value with a 400 response.

Severity
Low · CVSS 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Published
Source
[NVD] · [CVE record]
EPSS
0.17% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "python-daphne",
      "status": "fixed",
      "release": "sid",
      "version": "4.2.3-1"
    },
    {
      "name": "python-daphne",
      "status": "fixed",
      "release": "forky",
      "version": "4.2.3-1"
    },
    {
      "name": "python-daphne",
      "status": "fixed",
      "release": "trixie",
      "version": "4.1.2-2+deb13u1"
    },
    {
      "name": "python-daphne",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "4.0.0-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1138864,
      "name": "python-daphne",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "4.2.2-0.1"
    },
    {
      "bug": 1138864,
      "name": "python-daphne",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "4.2.2-0.1"
    },
    {
      "bug": 1138864,
      "name": "python-daphne",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "4.1.2-2+deb13u1"
    },
    {
      "bug": 1138864,
      "name": "python-daphne",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "python-daphne",
      "ecosystem": "cpe",
      "fixed_version": "not yet fixed"
    },
    {
      "name": "daphne",
      "ecosystem": "cpe",
      "fixed_version": "4.2.2"
    }
  ]
}

[Debian bug #1138864]

Publisher notes

[bookworm] python-daphne: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [daphne]Unknown

    Source package: [python-daphne]

    Details (2)

    • 4.0.0-1 · all · bookworm

      Affected

      nvd · python-daphne · debian · bookworm; nvd · python-daphne · debian · 12

    • 4.0.0-1 · all · bookworm

      Affected

      nvd · python-daphne · debian · bookworm; nvd · python-daphne · debian · 12

  • [python3-daphne]Unknown

    Source package: [python-daphne]

    Details (2)

    • 4.0.0-1 · all · bookworm

      Affected

      nvd · python-daphne · debian · bookworm; nvd · python-daphne · debian · 12

    • 4.0.0-1 · all · bookworm

      Affected

      nvd · python-daphne · debian · bookworm; nvd · python-daphne · debian · 12

[Debian 13 (Trixie)]

  • [daphne]Unknown

    Source package: [python-daphne]

    Details (2)

    • 4.1.2-2+deb13u1 · all · trixie

      Fixed · Fixed: 4.1.2-2+deb13u1

      nvd · python-daphne · debian · 13

    • 4.1.2-2+deb13u1 · all · trixie

      Fixed · Fixed: 4.1.2-2+deb13u1

      nvd · python-daphne · debian · 13

  • [python3-daphne]Unknown

    Source package: [python-daphne]

    Details (2)

    • 4.1.2-2+deb13u1 · all · trixie

      Fixed · Fixed: 4.1.2-2+deb13u1

      nvd · python-daphne · debian · 13

    • 4.1.2-2+deb13u1 · all · trixie

      Fixed · Fixed: 4.1.2-2+deb13u1

      nvd · python-daphne · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]