Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-23941— Request smuggling via first-wins Content-Length parsing in inets httpd

Quick assessment

Affected
Erlang OTP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP 17.0至28.4.1版本、27.3.4.9版本和26.2.5.18版本存在安全漏洞，该漏洞源于HTTP请求解析不一致，可能导致HTTP请求夹带攻击。

CVSS 7.0 · High EPSS 0.45% · P37

Affected Version Matrix 3

VendorProduct Version RangeStatus
Erlang OTP 5.10< * affected
17.0< * affected
84adefa331c4159d432d22840663c38f155cd4c1< * affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-23941

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Request smuggling via first-wins Content-Length parsing in inets httpd
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
Erlang/OTP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP 17.0至28.4.1版本、27.3.4.9版本和26.2.5.18版本存在安全漏洞，该漏洞源于HTTP请求解析不一致，可能导致HTTP请求夹带攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Erlang OTP 5.10 ~ * cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Erlang OTP 17.0 ~ * cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-23941

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-23941

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-23941 (3)

Vendor Advisories for CVE-2026-23941 (3)

Same Patch Batch · Erlang · 2026-03-13 · 3 CVEs total

CVE-2026-23943 6.9 MEDIUM Pre-auth SSH DoS via unbounded zlib inflate
CVE-2026-23942 5.3 MEDIUM SFTP root escape via component-agnostic prefix check in ssh_sftpd

IV. Related Vulnerabilities

Same product: OTP
Same vendor: Erlang
Same weakness: CWE-444

V. Comments for CVE-2026-23941

No comments yet

Leave a comment