CVE-2026-54585: medium-severity vulnerability in MidnightBSD mport
mport sample file handling can write outside the configured root
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6epss 0.5%
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.
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
Affected products
MidnightBSD · mportRelated CVEs — MidnightBSD mport
In the same product, most dangerous first.
CVE-2026-54582MEDIUMmport package installation can overwrite existing unmanaged or differently owned filesEPSS 0.6%CVE-2026-54583HIGHmport package bundle downloads allow unsafe destination filenamesEPSS 0.5%CVE-2026-54584MEDIUMmport trusts environment-controlled temporary directories in privileged metadata extractionEPSS 0.5%CVE-2026-54580HIGHmport index decompression can leave partial or corrupt index data after zstd failuresEPSS 0.3%CVE-2026-54581HIGHmport bootstrap index fetch can continue after hash verification failureEPSS 0.2%CVE-2026-54577LOWmport audit can inspect the wrong package when options are presentEPSS 0.2%