Medium severity · published Sep 17, 2026
CVE-2026-54585
mport sample file handling can write outside the configured root
6.0
CVSS
0.5%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MP
mport · MidnightBSD
< 2.7.8 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54585
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54585
github.com
https://github.com/MidnightBSD/mport/commit/36a42c8ddbd23ee9eb72c4c17596eb92cb423cf0
github.com
https://github.com/MidnightBSD/mport/pull/122
github.com
https://github.com/MidnightBSD/mport/releases/tag/2.7.8
github.com
https://github.com/MidnightBSD/mport/security/advisories/GHSA-xqjc-rxmm-p27v
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