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DEBIAN-CVE-2026-23941

Type: advisorySource: OSV1 source record

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in Erlang OTP (inets httpd module) allows HTTP Request Smuggling. This vulnerability is associated with program files lib/inets/src/http_server/httpd_request.erl and program routines httpd_request:parse_headers/7. The server does not reject or normalize duplicate Content-Length headers. The earliest Content-Length in the request is used for body parsing while common reverse proxies (nginx, Apache httpd, Envoy) honor the last Content-Length value. This violates RFC 9112 Section 6.3 and allows front-end/back-end desynchronization, leaving attacker-controlled bytes queued as the start of the next request. This issue affects OTP from OTP 17.0 before OTP 28.4.1, OTP 27.3.4.9 and OTP 26.2.5.18, corresponding to inets from 5.10 before 9.6.1, 9.3.2.3 and 9.1.0.5.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-23941

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-23941

erlang

Source reference: /affected/0/package/name

Affected versions
1:25.2.3+dfsg-1

Source reference: /affected/0/versions

1:25.2.3+dfsg-1+deb12u1

Source reference: /affected/0/versions

1:25.2.3+dfsg-1+deb12u2

Source reference: /affected/0/versions

1:25.2.3+dfsg-1+deb12u3

Source reference: /affected/0/versions

Fixed versions
1:25.2.3+dfsg-1+deb12u4

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

erlang

Source reference: /affected/1/package/name

Affected versions
1:27.3.4.1+dfsg-1

Source reference: /affected/1/versions

1:27.3.4.1+dfsg-1+deb13u1

Source reference: /affected/1/versions

Fixed versions
1:27.3.4.1+dfsg-1+deb13u2

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

erlang

Source reference: /affected/2/package/name

Affected versions
1:27.3.4.1+dfsg-1

Source reference: /affected/2/versions

1:27.3.4.3+dfsg-1

Source reference: /affected/2/versions

1:27.3.4.4+dfsg-1

Source reference: /affected/2/versions

1:27.3.4.6+dfsg-1

Source reference: /affected/2/versions

1:27.3.4.8+dfsg-1

Source reference: /affected/2/versions

Fixed versions
1:27.3.4.9+dfsg-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:25.2.3+dfsg-1+deb12u4"
          }
        ]
      }
    ],
    "package": {
      "name": "erlang",
      "purl": "pkg:deb/debian/erlang?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1:25.2.3+dfsg-1",
      "1:25.2.3+dfsg-1+deb12u1",
      "1:25.2.3+dfsg-1+deb12u2",
      "1:25.2.3+dfsg-1+deb12u3"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23941.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:27.3.4.1+dfsg-1+deb13u2"
          }
        ]
      }
    ],
    "package": {
      "name": "erlang",
      "purl": "pkg:deb/debian/erlang?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1:27.3.4.1+dfsg-1",
      "1:27.3.4.1+dfsg-1+deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23941.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:27.3.4.9+dfsg-1"
          }
        ]
      }
    ],
    "package": {
      "name": "erlang",
      "purl": "pkg:deb/debian/erlang?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1:27.3.4.1+dfsg-1",
      "1:27.3.4.3+dfsg-1",
      "1:27.3.4.4+dfsg-1",
      "1:27.3.4.6+dfsg-1",
      "1:27.3.4.8+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23941.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56642 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-23941 · Revision 1Source updated