All vulnerabilities
CVE-2026-110835GHSA-87v8-2gwr-ww9j

FreeRDP 3.0.0 before 3.32.0 HTTP Header Injection via Proxy Routing Token

FreeRDP FreeRDP
Open in ThreatlineRecord JSON
CVSS
6.3Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 18 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 11% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.32.0Fixed versionCVE List
Published14 Oct 2026Updated 18 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

FreeRDP 3.0.0 before 3.32.0 allows HTTP header injection in its proxy because a lone LF in the target portion of a routing token (Cookie: msts=) is not rejected and is written by http_proxy_connect into the CONNECT request line and Host header. A remote unauthenticated RDP client connecting to a proxy using FixedTarget=false and an upstream HTTP proxy can alter HTTP request/header framing at that upstream proxy.

Text from CVE List

Affected versions 2

  • FreeRDPaffected: 3.0.0 before 3.32.0CVE List
  • FreeRDPunaffected: 3.32.0CVE List

References 2