CVE-2026-54586: Midnightbsd Mport

Medium severity, CVSS 6.0. EPSS: 0.2% chance of exploitation in the next 30 days.

mport is the MidnightBSD Package Manager. Prior to 2.7.8, the mport_fetch_index(), mport_fetch_bootstrap_index(), and mport_fetch_bundle() paths in libmport/fetch.c accepted non-HTTPS repository and package mirror URLs without a url_is_https() enforcement check. When a cleartext URL was configured or returned by mirror data, a network-positioned attacker could tamper with package index or package download traffic and compromise package selection or integrity. This issue is fixed in version 2.7.8.

Affected products

• Midnightbsd Mport: before 2.7.8 (fixed in 2.7.8)

Published 2026-09-17. Last modified 2026-09-21.