CVE-2026-54584: Midnightbsd Mport

Medium severity, CVSS 5.3. EPSS: 0.5% chance of exploitation in the next 30 days.

mport is the MidnightBSD Package Manager. mport before 2.7.8 used TMPDIR while extracting package metafiles, including when running as root or in setuid/setgid contexts. An attacker able to control the environment for a privileged mport invocation could redirect temporary metadata extraction to an attacker-controlled location. PR 123 ignores unsafe TMPDIR values in privileged contexts and rejects empty TMPDIR. This issue has been patched in version 2.7.8.

Affected products

• Midnightbsd Mport: before 2.7.8 (fixed in 2.7.8)

Published 2026-09-21. Last modified 2026-09-25.