CVE-2025-3110

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

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://openvpn.net/as-docs/as-3-2-release-notes.html	Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:*

History

10 Jul 2026, 17:00

Type	Values Removed	Values Added
CPE		cpe:2.3:a:openvpn:openvpn_access_server::::::::
References	~~() https://openvpn.net/as-docs/as-3-2-release-notes.html -~~	() https://openvpn.net/as-docs/as-3-2-release-notes.html - Release Notes
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
First Time		Openvpn Openvpn openvpn Access Server

08 Jul 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-08 17:17

Updated : 2026-07-10 17:00

NVD link : CVE-2025-3110

Mitre link : CVE-2025-3110

CVE.ORG link : CVE-2025-3110

JSON object : View

Products Affected

openvpn

openvpn_access_server

CWE

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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