CVE-2026-67289

What it is

FreeRDP before 3.29.0 (affected versions <= 3.28.0) does not validate CRLF and control characters in the server-controlled RDP redirection TargetNetAddress field. This value is copied into the client's ServerHostname and, when the client connects through an HTTP proxy, is written directly into the proxy CONNECT request line and Host header by http_proxy_connect() without filtering. A malicious or compromised RDP server can send a crafted redirection PDU containing embedded control characters to inject arbitrary headers/requests into the HTTP proxy CONNECT request.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-08-01 13:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-02 19:12 UTC Last updatedMost recent change to the record

Details

Published

2026-08-01 13:16 UTC

Last modified

2026-10-02 19:12 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-113

Record status

Analyzed

Affected

• Freerdp < 3.29.0

Attack profile CVSS 4.0 · 9.3

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High