Vulnerability Description
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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af31
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mwwh-mhp9-q7vm
- https://www.vulncheck.com/advisories/freerdp-before-http-proxy-request-injection
FAQ
What is CVE-2026-67289?
CVE-2026-67289 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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'...
How severe is CVE-2026-67289?
CVE-2026-67289 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-67289?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.