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mport package bundle downloads allow unsafe destination filenames

CVSS 4.0 8.3 HIGHCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-54583

Published

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 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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-54583

Published

mport

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "MidnightBSD",
                    "product": "mport",
                    "versions": [
                        {
                            "version": "< 2.7.8",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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Sources read 13 Nov 07:12 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current