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CVE-2026-54581
mport bootstrap index fetch can continue after hash verification failure
High8.3EPSS 0.22%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | High8.3 | 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 |
| NVDNVD · Deferred | 4.0 | High8.3 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.3.
Weakness
Affected products
- affected < 2.7.8
References (6)
- https://github.com/MidnightBSD/mport/security/advisories/GHSA-895r-rv8j-7g23 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/MidnightBSD/mport/pull/134 (opens in a new tab)x_refsource_MISC
- https://github.com/MidnightBSD/mport/pull/135 (opens in a new tab)x_refsource_MISC
- https://github.com/MidnightBSD/mport/commit/64ebf3f60dc3df72a3b47fbb20a7f8072c0a0f5e (opens in a new tab)x_refsource_MISC
- https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d (opens in a new tab)x_refsource_MISC
- https://github.com/MidnightBSD/mport/releases/tag/2.7.8 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-54581)Record last updated .