MidnightBSD mport up to 2.7.7 fetch libmport/fetch.c mport_fetch_bootstrap_index data authenticity

Summaryinfo

A vulnerability, which was classified as problematic, was found in MidnightBSD mport up to 2.7.7. This affects the function mport_fetch_bootstrap_index of the file libmport/fetch.c of the component fetch. The manipulation results in data authenticity. This vulnerability is known as CVE-2026-54581. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in MidnightBSD mport up to 2.7.7. It has been classified as problematic. Affected is the function mport_fetch_bootstrap_index of the file libmport/fetch.c of the component fetch. The manipulation with an unknown input leads to a data authenticity vulnerability. CWE is classifying the issue as CWE-345. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. This is going to have an impact on integrity, and availability. CVE summarizes:

mport is the MidnightBSD Package Manager. Prior to 2.7.8, the mport_fetch_bootstrap_index() function in libmport/fetch.c could return success when bootstrap index hash verification encountered a missing or invalid hash because the failure path did not preserve a fatal result. A network attacker or compromised mirror able to alter bootstrap index content or its transport path could therefore cause mport to proceed with an unverified or tampered bootstrap package index. This issue is fixed in version 2.7.8.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-54581 since 06/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 2.7.8 eliminates this vulnerability.

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Productinfo

Vendor

• MidnightBSD

Name

• mport

Version

• 2.7.0
• 2.7.1
• 2.7.2
• 2.7.3
• 2.7.4
• 2.7.5
• 2.7.6
• 2.7.7

Website

• Product: https://github.com/MidnightBSD/mport/

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