High 8.3Published Sep 17, 2026

CVE-2026-54581mport bootstrap index fetch can continue after hash verification failure

Updated under an hour ago (2026-10-19 06:25 UTC)

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It affects MidnightBSD mport. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for MidnightBSD mport

Exploited in the last 30 days

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.

CVSS: 8.3 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-345, CWE-347
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

MidnightBSD mport midnightbsd:mport (from the name)	before 2.7.8	CNA record

References

https://github.com/MidnightBSD/mport/security/advisories/GHSA-895r-rv8j-7g23x-refsource-confirm
https://github.com/MidnightBSD/mport/pull/134x-refsource-misc
https://github.com/MidnightBSD/mport/pull/135x-refsource-misc
https://github.com/MidnightBSD/mport/commit/64ebf3f60dc3df72a3b47fbb20a7f8072c0a0f5ex-refsource-misc
https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3dx-refsource-misc
https://github.com/MidnightBSD/mport/releases/tag/2.7.8x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.