CVE-2026-109245 FreeRDP 3.0.0 before 3.32.0 Improper Certificate Validation in freerdp_http_request
On-path attackers can bypass TLS certificate validation in FreeRDP to intercept OAuth codes and impersonate Azure AD, leading to credential theft.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-109245?
CVE-2026-109245 is a high-severity vulnerability in FreeRDP, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
FreeRDP 3.0.0 before 3.32.0 contains an improper certificate validation vulnerability in freerdp_http_request() in libfreerdp/utils/http.c that completes TLS handshakes without verifying the server certificate chain. On-path attackers can impersonate login.microsoftonline.com in the Azure AD authentication flow to capture OAuth authorization codes and substitute the OpenID discovery document.
Weakness: CWE-295
Which versions are affected by CVE-2026-109245?
How do I fix CVE-2026-109245?
Upgrade to a fixed version.
Is CVE-2026-109245 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109245 exists.
Sources
Also known as DEBIAN-CVE-2026-109245, GHSA-h44v-39x6-9xvg, GHSA-p9p8-552v-g7hc, UBUNTU-CVE-2026-109245.