Vulnerability · Published Sep 17, 2026 · Assigned by GitHub_M

CVE-2026-54585mport sample file handling can write outside the configured root

Medium 6.0

In plain English

A medium-severity path traversal in mport from MidnightBSD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 4.0)6.0Medium

Exploit odds (30 days)0.5%top 54.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

mport is the MidnightBSD Package Manager. Prior to 2.7.8, create_sample_file() in libmport/bundle_read_install_pkg.c did not constrain absolute source and destination paths from the sample-file manifest directive to mport->root. A malicious or malformed package manifest could therefore direct privileged sample-file handling to copy or write outside the configured installation root, compromising local filesystem integrity. This issue is fixed in version 2.7.8.

Affected products (as reported)

Vendor	Product	Versions
MidnightBSD	mport	< 2.7.8

Weakness: CWE-22 · Vector: 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

References

https://github.com/MidnightBSD/mport/security/advisories/GHSA-xqjc-rxmm-p27v x_refsource_CONFIRM
https://github.com/MidnightBSD/mport/pull/122 x_refsource_MISC
https://github.com/MidnightBSD/mport/commit/36a42c8ddbd23ee9eb72c4c17596eb92cb423cf0 x_refsource_MISC
https://github.com/MidnightBSD/mport/releases/tag/2.7.8 x_refsource_MISC