#VU125775 Inconsistent interpretation of HTTP requests in otp - CVE-2026-23941
Published: April 10, 2026
Vulnerability identifier: #VU125775
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-23941
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
otp
otp
Software vendor:
erlang
erlang
Description
The vulnerability allows a remote attacker to smuggle HTTP requests.
The vulnerability exists due to inconsistent interpretation of HTTP requests in inets httpd Content-Length parsing when processing requests with duplicate Content-Length headers that contain different values. A remote attacker can send a specially crafted request to smuggle HTTP requests.
Exploitation requires httpd to be deployed behind a reverse proxy, load balancer, or CDN that uses a different Content-Length resolution strategy, typically with persistent connections enabled.
Remediation
Install security update from vendor's website.