Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110835FreeRDP 3.0.0 before 3.32.0 HTTP Header Injection via Proxy Routing Token

Medium 4.0

In plain English

A medium-severity security flaw in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.0Medium

Exploit odds (30 days)0.3%top 82.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-110835
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-110835
Debian:14	freerdp3	3.32.0+dfsg-1	DEBIAN-CVE-2026-110835
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-110835
Ubuntu:24.04:LTS	freerdp3	3.32.0+dfsg-0ubuntu0.24.04.1	UBUNTU-CVE-2026-110835
Ubuntu:26.04:LTS	freerdp3	3.32.0+dfsg-0ubuntu0.26.04.1	UBUNTU-CVE-2026-110835

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	3.0.0 – before 3.32.0

Weakness: CWE-93 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

References

GitHub Security Advisory (GHSA-87v8-2gwr-ww9j) vendor-advisory
VulnCheck Advisory: FreeRDP 3.0.0 before 3.32.0 HTTP Header Injection via Proxy Routing Token third-party-advisory