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Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in Erlang OTP (inets httpd module) allows HTTP Request… (CVE-2026-23941)

0
Medium
VulnerabilityCVE-2026-23941gcveosvubuntu-cve-2026-23941cve-2026-23941ubuntu-pro-14-04-ltsubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-25-10ubuntu-26-04-lts
Published: 03/13/2026 (03/13/2026, 19:54:00 UTC)
Source: GCVE Database
Product: erlang

Description

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.

CVSS v3.1

Score 9.4critical

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected software

Ubuntu:Pro:14.04:LTSmore threats →ghsa
erlang
pkg:deb/ubuntu/erlang?arch=source&distro=esm-infra-legacy/trusty
Affected versions
<1:16.b.3-dfsg-1ubuntu2.2+esm2=1:16.b.1-dfsg-4ubuntu1=1:16.b.2-dfsg-1ubuntu1=1:16.b.2-dfsg-2ubuntu1=1:16.b.3-dfsg-1ubuntu1=1:16.b.3-dfsg-1ubuntu2=1:16.b.3-dfsg-1ubuntu2.1=1:16.b.3-dfsg-1ubuntu2.2=1:16.b.3-dfsg-1ubuntu2.2+esm1
Ubuntu:Pro:16.04:LTSmore threats →ghsa
erlang
pkg:deb/ubuntu/erlang?arch=source&distro=esm-infra-legacy/xenial
Affected versions
<1:18.3-dfsg-1ubuntu3.1+esm3=1:18.0-dfsg-1ubuntu1=1:18.0-dfsg-1ubuntu2=1:18.2-dfsg-2ubuntu1=1:18.3-dfsg-1ubuntu1=1:18.3-dfsg-1ubuntu2=1:18.3-dfsg-1ubuntu3=1:18.3-dfsg-1ubuntu3.1=1:18.3-dfsg-1ubuntu3.1+esm1=1:18.3-dfsg-1ubuntu3.1+esm2
Ubuntu:Pro:18.04:LTSmore threats →ghsa
erlang
pkg:deb/ubuntu/erlang?arch=source&distro=esm-infra/bionic
Affected versions
<1:20.2.2+dfsg-1ubuntu2+esm3=1:20.0.4+dfsg-1ubuntu1=1:20.1.2+dfsg-1ubuntu1=1:20.1.3+dfsg-1ubuntu1=1:20.1.4+dfsg-1ubuntu1=1:20.1.5+dfsg-1ubuntu1=1:20.1.6+dfsg-1ubuntu1=1:20.1.7+dfsg-1ubuntu1=1:20.2.1+dfsg-1ubuntu1=1:20.2.2+dfsg-1ubuntu1=1:20.2.2+dfsg-1ubuntu2=1:20.2.2+dfsg-1ubuntu2+esm1=1:20.2.2+dfsg-1ubuntu2+esm2
Ubuntu:Pro:20.04:LTSmore threats →ghsa
erlang
pkg:deb/ubuntu/erlang?arch=source&distro=esm-infra/focal
Affected versions
<1:22.2.7+dfsg-1ubuntu0.5+esm2=1:22.0.7+dfsg-1build1=1:22.2+dfsg-1=1:22.2.1+dfsg-1=1:22.2.2+dfsg-1=1:22.2.3+dfsg-1=1:22.2.3+dfsg-2=1:22.2.4+dfsg-1=1:22.2.7+dfsg-1=1:22.2.7+dfsg-1ubuntu0.2=1:22.2.7+dfsg-1ubuntu0.3=1:22.2.7+dfsg-1ubuntu0.4=1:22.2.7+dfsg-1ubuntu0.5=1:22.2.7+dfsg-1ubuntu0.5+esm1
Ubuntu:22.04:LTSmore threats →ghsa
erlang
pkg:deb/ubuntu/erlang?arch=source&distro=jammy
Affected versions
<1:24.2.1+dfsg-1ubuntu0.7=1:23.2.6+dfsg-1build1=1:24.1.1+dfsg-1=1:24.1.4+dfsg-1=1:24.1.5+dfsg-1=1:24.1.5+dfsg-1ubuntu1=1:24.2+dfsg-1=1:24.2.1+dfsg-1=1:24.2.1+dfsg-1ubuntu0.1=1:24.2.1+dfsg-1ubuntu0.2=1:24.2.1+dfsg-1ubuntu0.3=1:24.2.1+dfsg-1ubuntu0.4=1:24.2.1+dfsg-1ubuntu0.5=1:24.2.1+dfsg-1ubuntu0.6
Ubuntu:24.04:LTSmore threats →ghsa
erlang
pkg:deb/ubuntu/erlang?arch=source&distro=noble
Affected versions
<1:25.3.2.8+dfsg-1ubuntu4.7=1:25.2.3+dfsg-1=1:25.3.2.8+dfsg-1=1:25.3.2.8+dfsg-1ubuntu1=1:25.3.2.8+dfsg-1ubuntu3=1:25.3.2.8+dfsg-1ubuntu4=1:25.3.2.8+dfsg-1ubuntu4.1=1:25.3.2.8+dfsg-1ubuntu4.2=1:25.3.2.8+dfsg-1ubuntu4.3=1:25.3.2.8+dfsg-1ubuntu4.4=1:25.3.2.8+dfsg-1ubuntu4.5=1:25.3.2.8+dfsg-1ubuntu4.6
Ubuntu:25.10more threats →ghsa
erlang
pkg:deb/ubuntu/erlang?arch=source&distro=questing
Affected versions
=1:27.3+dfsg-1ubuntu1=1:27.3+dfsg-1ubuntu1.1=1:27.3.4.1+dfsg-1=1:27.3.4.1+dfsg-1build1=1:27.3.4.1+dfsg-1ubuntu0.1
Ubuntu:26.04:LTSmore threats →ghsa
erlang
pkg:deb/ubuntu/erlang?arch=source&distro=resolute
Affected versions
<1:27.3.4.6+dfsg-1ubuntu0.1=1:27.3.4.1+dfsg-1build1=1:27.3.4.3+dfsg-1=1:27.3.4.4+dfsg-1=1:27.3.4.6+dfsg-1

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-23941
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
Cvss Version
3.1
State
PUBLISHED

Patch Information

Threat ID: 6abb4196f7a7c54106cc3820

Added to database: 09/29/2026, 04:41:58 UTC

Last updated: 09/29/2026, 04:42:31 UTC

Views: 1

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