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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-23941 Detail

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 until OTP 28.4.1, OTP 27.3.4.9 and OTP 26.2.5.18, corresponding to inets from 5.10 until 9.6.1, 9.3.2.3 and 9.1.0.5.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  EEF
CVSS-B 7.0 HIGH
Vector:  CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:L

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cna.erlef.org/cves/CVE-2026-23941.html EEF Vendor Advisory 
https://github.com/erlang/otp/commit/a4b46336fd25aa100ac602eb9a627aaead7eda18 EEF Patch 
https://github.com/erlang/otp/commit/a761d391d8d08316cbd7d4a86733ba932b73c45b EEF Patch 
https://github.com/erlang/otp/commit/e775a332f623851385ab6ddb866d9b150612ddf6 EEF Patch 
https://github.com/erlang/otp/security/advisories/GHSA-w4jc-9wpv-pqh7 EEF Vendor Advisory 
https://osv.dev/vulnerability/EEF-CVE-2026-23941 EEF Third Party Advisory 
https://www.erlang.org/doc/system/versions.html#order-of-versions EEF Product 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') EEF  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-23941
NVD Published Date:
03/13/2026
NVD Last Modified:
05/21/2026
Source:
EEF