CVE-2026-54582

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.

• CWE-73
• CWE-668

• https://github.com/MidnightBSD/mport/commit/c643312d149dcc994957dbafa8f6f6b61e945e39
• https://github.com/MidnightBSD/mport/pull/131
• https://github.com/MidnightBSD/mport/releases/tag/2.7.8
• https://github.com/MidnightBSD/mport/security/advisories/GHSA-5773-7r4r-rpgx

Published

Sep 17, 2026

Last Modified

Sep 17, 2026

Status

Deferred

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