{"id":"CVE-2026-54580","title":"mport is the MidnightBSD Package Manager","summary":"mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures t…","severity":"high","cvss":8.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-354","CWE-755"],"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-2026-54580","references":[{"url":"https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d","label":"security-advisories@github.com"},{"url":"https://github.com/MidnightBSD/mport/pull/135","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-ffqj-j42r-747w","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-17T17:23:30.628Z","epss":0.0025,"epssPercentile":0.16687,"slug":"CVE-2026-54580","body":"## Overview\n\nmport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. 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":[]}