CVE-2026-91958

Description

FreeRDP versions before 3.31.0 fail to validate MonitorIds array values when parsing RDP connection files, allowing unbounded array indexing in xf_detect_monitors. Attackers can craft a malicious RDP file with an out-of-range selectedmonitors value to trigger out-of-bounds heap read and write operations when opened in xfreerdp.

CVSS Vector

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23pf-q83q-x45r
• https://www.vulncheck.com/advisories/freerdp-3.11.0-through-3.30.0-heap-buffer-overflow-via-monitor-index
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23pf-q83q-x45r