Information disclosure in FreeRDP - CVE-2026-85089
Published: September 1, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU146590
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-85089
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to exposure of uninitialized heap memory in Save Session Info PDU writers in libfreerdp/core/info.c when serializing Save Session Info PDUs. A remote user can trigger the server or proxy to send a specially crafted Save Session Info PDU to disclose sensitive information.
The issue affects freerdp-proxy and third-party FreeRDP-based servers that originate or re-serialize this PDU, and repeated reconnects can yield fresh leaked heap samples.
Affected software
FreeRDP
How to mitigate CVE-2026-85089
Install security update from vendor's website.
FreeRDP - update to 3.31.0