PX4 Autopilot MAVLink FTP Session Validation Logic Error Allows Operations on Invalid File Descriptors

published 2026-03-13 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-12174

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

PX4 autopilot is a flight control solution for drones. Prior to 1.17.0-rc2, A logic error in the PX4 Autopilot MAVLink FTP session validation uses incorrect boolean logic (&& instead of ||), allowing BurstReadFile and WriteFile operations to proceed with invalid sessions or closed file descriptors. This enables an unauthenticated attacker to put the FTP subsystem into an inconsistent state, trigger operations on invalid file descriptors, and bypass session isolation checks. This vulnerability is fixed in 1.17.0-rc2.

Patch / fix

fixed in 1

dronecode px4_drone_autopilot 1.17.0

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 7 mo ago (2026-03-17)

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/PX4/PX4-Autopilot/security/advisories/GHSA-pp2c-jr5g-6f2m referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD	3.1	6.5	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

PX4 PX4-Autopilot

Classification

Weakness

CWE-670 Always-Incorrect Control Flow Implementation

References

github.com /PX4/PX4-Autopilot/security/advisories/GHSA-pp2c-jr5g-6f2m
exploit, vendor-advisory

Sources

CVE List CVE-2026-32713
NVD CVE-2026-32713

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary