---
id: CVE-2026-67289
title: >-
  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
summary: >-
  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…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-113
published: '2026-08-01'
updated: '2026-08-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67289'
references:
  - url: >-
      https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af319f
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mwwh-mhp9-q7vm'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-http-proxy-request-injection-via-redirection
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-08-02T05:17:49.412Z'
epss: 0.00397
epssPercentile: 0.33727
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.