HTTP Response Splitting Affecting freerdp3 package, versions <3.29.0+dfsg-1


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.38% (31st percentile)

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  • Snyk IDSNYK-DEBIAN14-FREERDP3-18505551
  • published2 Aug 2026
  • disclosed1 Aug 2026

Introduced: 1 Aug 2026

NewCVE-2026-67289  (opens in a new tab)
CWE-113  (opens in a new tab)

How to fix?

Upgrade Debian:14 freerdp3 to version 3.29.0+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp3 package and not the freerdp3 package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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 Base Scores

version 3.1