CRLF Injection Affecting libwinpr package, versions <2:2.2.0-12.el8_8.10


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.4% (33rd percentile)

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  • Snyk IDSNYK-RHEL8-LIBWINPR-19499047
  • published2 Sept 2026
  • disclosed1 Aug 2026

Introduced: 1 Aug 2026

CVE-2026-67289  (opens in a new tab)
CWE-93  (opens in a new tab)

How to fix?

Upgrade RHEL:8 libwinpr to version 2:2.2.0-12.el8_8.10 or higher.
This issue was patched in RHSA-2026:61251.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libwinpr package and not the libwinpr package as distributed by RHEL. See How to fix? for RHEL:8 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