CVE-2025-3110

HIGH

Openvpn Access Server < 3.1.0 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Title source: rule

Description

OpenVPN Access Server 2.7.2 through 3.1.0 accepts bare line-feed sequences inside HTTP header values, allowing remote attackers to perform HTTP request smuggling when deployed behind a reverse proxy

References (1)

Core 1

Core References

Release Notes release-notes

https://openvpn.net/as-docs/as-3-2-release-notes.html

Scores

CVSS v3 7.5

EPSS 0.0026

EPSS Percentile 17.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-444

Status published

Products (2)

OpenVPN/Access Server 2.7.2 - 3.1.0

openvpn/openvpn_access_server 2.7.2 - 3.1.0

Published Jul 08, 2026

Tracked Since Jul 08, 2026