Medium 6.0Published Sep 17, 2026

CVE-2026-54582mport package installation can overwrite existing unmanaged or differently owned files

Updated under an hour ago (2026-10-19 06:10 UTC)

Does this affect you?

It affects MidnightBSD mport. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for MidnightBSD mport

Exploited in the last 30 days

mport is the MidnightBSD Package Manager. Prior to 2.7.8, package installation lacked a preflight check for incoming non-directory assets that already existed on disk. The affected logic across libmport/check_preconditions.c, libmport/install_primative.c, and libmport/mport_private.h did not apply MPORT_PRECHECK_FILE_CONFLICTS, so a crafted or conflicting package could overwrite a file owned by another package or unmanaged by mport. The check is bypassed only when the operator explicitly enables mport->force. Privileged installation without that override could compromise local filesystem integrity and package database consistency. This issue is fixed in version 2.7.8.

CVSS: 6.0 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-73, CWE-668
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

MidnightBSD mport midnightbsd:mport (from the name)	before 2.7.8	CNA record

References

https://github.com/MidnightBSD/mport/security/advisories/GHSA-5773-7r4r-rpgxx-refsource-confirm
https://github.com/MidnightBSD/mport/pull/131x-refsource-misc
https://github.com/MidnightBSD/mport/commit/c643312d149dcc994957dbafa8f6f6b61e945e39x-refsource-misc
https://github.com/MidnightBSD/mport/releases/tag/2.7.8x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.