{"id":"CVE-2026-54583","title":"mport is the MidnightBSD Package Manager","summary":"mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/fetch.c did not consistently reject empty, dot, dot-dot, or slash-containing bundle filenames before composing package download and write paths. Malicious package index d…","severity":"high","cvss":8.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","cwe":["CWE-22","CWE-73"],"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-2026-54583","references":[{"url":"https://github.com/MidnightBSD/mport/commit/cad959d47bc79a62b6a7163800fbfe35633e7cf8","label":"security-advisories@github.com"},{"url":"https://github.com/MidnightBSD/mport/pull/125","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-mr62-mqwj-vhh3","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-17T16:59:46.851963Z"},"cvssSource":"cna","ingestedAt":"2026-09-17T17:23:30.629Z","epss":0.00517,"epssPercentile":0.42825,"slug":"CVE-2026-54583","body":"## Overview\n\nmport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/fetch.c did not consistently reject empty, dot, dot-dot, or slash-containing bundle filenames before composing package download and write paths. Malicious package index data could place an unsafe value in indexEntry->bundlefile, and the missing is_valid_bundle_filename() checks allowed downloaded package data to be written outside the intended cache location or to an unsafe destination name. This issue is fixed in version 2.7.8.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":45.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}