CVE-2026-1579: PX4 Autopilot Missing authentication for critical function
The MAVLink communication protocol does not require cryptographic authentication by default. When MAVLink 2.0 message signing is not enabled, any message -- including SERIALCONTROL, which provides interactive shell access -- can be sent by an unauthenticated party with access to the MAVLink interface. PX4 provides MAVLink 2.0 message signing as the cryptographic authentication mechanism for all MAVLink communication. When signing is enabled, unsigned messages are rejected at the protocol level.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Enable MAVLink 2.0 message signing in PX4 to provide cryptographic authentication for all non-USB communication links; when signing is enabled, unsigned MAVLink messages are rejected (including on interfaces such as the MAVLink interface that allow SERIAL_CONTROL/interactive shell-related functions).
PX4 MAVLink 2.0 message signing MAVLink 2.0 message signing = enabled - Compensating control
Limit network/access to the PX4 MAVLink interface (non-USB communication links) so unauthenticated parties cannot send MAVLink messages when MAVLink 2.0 message signing is not enabled.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-1579?
CVE-2026-1579 has a high severity due to the lack of cryptographic authentication in MAVLink communications, allowing unauthorized access.
How do I fix CVE-2026-1579?
To fix CVE-2026-1579, enable MAVLink 2.0 message signing and configure the system to require cryptographic authentication.
What systems are affected by CVE-2026-1579?
CVE-2026-1579 affects the PX4 Autopilot system which uses the MAVLink communication protocol.
What can attackers do with CVE-2026-1579?
Attackers can exploit CVE-2026-1579 to send unauthorized MAVLink messages, potentially gaining interactive shell access.
Is CVE-2026-1579 publicly known?
Yes, CVE-2026-1579 is a publicly reported vulnerability, highlighting its critical nature and the need for immediate attention.