This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-91949 →

DEBIAN-CVE-2026-91949

FreeRDP server versions before 3.31.0 contain a protocol negotiation bypass vulnerability that allows unauthenticated attackers to establish RDSTLS co...

Original description

The description as published by the source.

FreeRDP server versions before 3.31.0 contain a protocol negotiation bypass vulnerability that allows unauthenticated attackers to establish RDSTLS connections despite server policy disabling them. Attackers can send incompatible protocol requests, receive negotiation failures, then complete TLS handshake and enter RDSTLS to bypass pre-authentication transport restrictions.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:13 freerdp3

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 freerdp3

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.31.0+dfsg-1"}]}]

References

advisory security-tracker.debian.org