CVE-2026-54584

Description

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.

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Weakness Type (CWE)

CWE-73 CWE-73

CWE-377 CWE-377

References

Other References

https://github.com/MidnightBSD/mport/commit/3790fa49a36cb085f48b204ef189fb82bbee621a https://github.com/MidnightBSD/mport/pull/123 https://github.com/MidnightBSD/mport/releases/tag/2.7.8 https://github.com/MidnightBSD/mport/security/advisories/GHSA-4vv3-3h8r-q6mq

Frequently Asked Questions

What is CVE-2026-54584? +

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.

How do I check if I'm vulnerable to CVE-2026-54584? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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