CVE-2026-91949
Fixed in a distro release EPSS <1%CVSS 9.3
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.
Products: FreeRDP
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | freerdp | 2:3.10.3-12.el10_2.13 |
| AlmaLinux 10 | freerdp-devel | 2:3.10.3-12.el10_2.13 |
| AlmaLinux 10 | freerdp-libs | 2:3.10.3-12.el10_2.13 |
| AlmaLinux 10 | freerdp-server | 2:3.10.3-12.el10_2.13 |
| AlmaLinux 10 | libwinpr | 2:3.10.3-12.el10_2.13 |
| AlmaLinux 10 | libwinpr-devel | 2:3.10.3-12.el10_2.13 |
| Amazon Linux 2023 | freerdp | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | freerdp-devel | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | freerdp-libs | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | freerdp-server | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | libwinpr | 2:3.31.0-1.amzn2023 |
| Amazon Linux 2023 | libwinpr-devel | 2:3.31.0-1.amzn2023 |
| Debian 13 | freerdp3 | no fix |
| Debian 14 | freerdp3 | 3.31.0+dfsg-1 |
| Red Hat Enterprise Linux 10.2 | freerdp | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | freerdp-debuginfo | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | freerdp-debugsource | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | freerdp-devel | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | freerdp-libs | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | freerdp-libs-debuginfo | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | freerdp-server | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | freerdp-server-debuginfo | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | libwinpr | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | libwinpr-debuginfo | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux 10.2 | libwinpr-devel | 2:3.10.3-12.el10_2.13 |
| Red Hat Enterprise Linux eus 10.0 | freerdp | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-debuginfo | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-debugsource | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-devel | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-libs | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-libs-debuginfo | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-server | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-server-debuginfo | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr-debuginfo | 2:3.10.3-3.el10_0.18 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr-devel | 2:3.10.3-3.el10_0.18 |
| Rocky Linux 10 | freerdp | 2:3.10.3-12.el10_2.13 |
| Ubuntu 16.04 LTS | freerdp | no fix |
| Ubuntu 18.04 LTS | freerdp | no fix |
| Ubuntu 22.04 LTS | freerdp2 | no fix |
| Ubuntu 24.04 LTS | freerdp3 | 3.31.0+dfsg-0ubuntu0.24.04.1 |
| Ubuntu 26.04 LTS | freerdp3 | 3.31.0+dfsg-0ubuntu0.26.04.1 |
| Ubuntu Pro 18.04 LTS | freerdp2 | no fix |
| Ubuntu Pro 20.04 LTS | freerdp2 | no fix |
| Ubuntu Pro 24.04 LTS | freerdp2 | no fix |