CVE-2026-67296

A flaw was found in FreeRDP. A remote attacker can exploit a vulnerability in the Remote Desktop Protocol (RDP) Enhanced Input (RDPEI) server channel handler. By sending a malicious RDPEI message with an oversized declared body length, the attacker can force the server to allocate excessive memory, leading to a denial of service (DoS).

A Moderate denial of service (DoS) vulnerability in FreeRDP's RDPEI server channel affects systems acting as an RDP server or proxy. A remote, unauthenticated attacker can send a specially crafted RDP message to trigger excessive memory allocation, causing service disruption.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this do not expose FreeRDP server/proxy/shadow (freerdp-shadow-cli / freerdp-proxy) to untrusted networks—allow only trusted clients via firewall, or disable those services if unused.