---
id: CVE-2026-110835
title: >-
  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 …
summary: >-
  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 …
severity: medium
cvss: 4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N'
cwe:
  - CWE-93
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP >= 3.0.0 < 3.32.0
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T15:54:26.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110835'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-87v8-2gwr-ww9j'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-http-header-injection-via-proxy-routing-token
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110835.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-110835'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2552973'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-110835'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110835'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - exploit-available
ingestedAt: '2026-10-15T00:02:07.172Z'
epss: 0.00261
epssPercentile: 0.1779
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-18T12:10:15.457278Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110835.json)