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Vulnerabilities CVE-2026-67289

CVE-2026-67289

Critical
Open
TLP:CLEAR

FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection

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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.

Details

CVSS Score
9.3
EPSS Score
0.38%

31.2th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Aug 1, 2026
Last Modified
Aug 5, 2026
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