Path Traversal in Dronecode Px4 Drone Autopilot
CVE-2026-32709
PX4 autopilot is a flight control solution for drones. Prior to 1.17.0-rc2, An unauthenticated path traversal vulnerability in the PX4 Autopilot MAVLink FTP implementation allows any MAVLink peer to read, write, create, delete, and rename arbitrary files on the flight controller filesystem without authentication. On NuttX targets, the FTP root directory is an empty string, meaning attacker-supplied paths are passed directly to filesystem syscalls with no prefix or sanitization for read operations. On POSIX targets (Linux companion computers, SITL), the write-path validation function unconditionally returns true, providing no protection. A TOCTOU race condition in the write validation on NuttX further allows bypassing the only existing guard. This vulnerability is fixed in 1.17.0-rc2.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.003 · change: -0.002
Affected products
- Dronecode Px4 Drone Autopilot — versions 1.17.0
- Px4 Px4-Autopilot — versions < 1.17.0-rc2
Weakness classification (CWE)
References
- github.com/PX4/PX4-Autopilot/security/advisories/GHSA-fh32-qxj9-x32f (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-32709?
- CVE-2026-32709 is a medium-severity vulnerability in Dronecode Px4 Drone Autopilot, classified under Path Traversal. CVSS score: 5.4/10. Published 2026-03-16.
- How severe is CVE-2026-32709?
- Medium severity. CVSS v3 base score is 5.4 out of 10.