PT-2026-56470 · Openvpn · Openvpn Access Server

Published 2026-07-08 · Updated 2026-07-08 · CVE-2025-3110

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions OpenVPN Access Server versions 2.7.2 through 3.1.0

Description The software accepts bare line-feed sequences within HTTP header values. This behavior allows remote attackers to perform HTTP request smuggling when the system is deployed behind a reverse proxy. HTTP request smuggling is a technique that interferes with the way a website and its reverse proxy process sequences of HTTP requests.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2025-3110

Affected Products

Openvpn Access Server

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2025-3110 · Security Note
• https://openvpn.net/as-docs/as-3-2-release-notes.html · Note
• https://twitter.com/CVEnew/status/2074931626409086983 · Twitter Post