---
id: CVE-2026-54582
title: mport is the MidnightBSD Package Manager
summary: >-
  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/in…
severity: medium
cvss: 6
cvssVector: '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'
cwe:
  - CWE-73
  - CWE-668
vendor: MidnightBSD
product: mport
affected:
  - mport < 2.7.8
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T21:15:06.427'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54582'
references:
  - url: >-
      https://github.com/MidnightBSD/mport/commit/c643312d149dcc994957dbafa8f6f6b61e945e39
    label: security-advisories@github.com
  - url: 'https://github.com/MidnightBSD/mport/pull/131'
    label: security-advisories@github.com
  - url: 'https://github.com/MidnightBSD/mport/releases/tag/2.7.8'
    label: security-advisories@github.com
  - url: >-
      https://github.com/MidnightBSD/mport/security/advisories/GHSA-5773-7r4r-rpgx
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-17T19:15:39.206598Z'
cvssSource: cna
ingestedAt: '2026-09-17T17:23:30.629Z'
epss: 0.00531
epssPercentile: 0.43825
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.