CVE-2026-110835 FreeRDP 3.0.0 before 3.32.0 HTTP Header Injection via Proxy Routing Token
Remote attackers can inject HTTP headers via proxy routing tokens in FreeRDP, altering request framing at upstream proxies.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-110835?
CVE-2026-110835 is a medium-severity vulnerability in Freerdp Freerdp, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-93
Which versions are affected by CVE-2026-110835?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-110835?
Upgrade to a fixed version.
Is CVE-2026-110835 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110835 exists.
Other vulnerabilities in Freerdp Freerdp
- CVE-2021-37594 Other in n/a
- CVE-2021-37595 Other in n/a
- CVE-2026-67305 FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
- CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
- CVE-2026-67289 FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection
Sources
Also known as DEBIAN-CVE-2026-110835, GHSA-3qf2-fpqv-9jfj, GHSA-87v8-2gwr-ww9j, UBUNTU-CVE-2026-110835.