CVE-2026-54585

MEDIUMPre-NVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 57% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.0Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

mport is the MidnightBSD Package Manager. Prior to 2.7.8, create_sample_file() in libmport/bundle_read_install_pkg.c did not constrain absolute source and destination paths from the sample-file manifest directive to mport->root. A malicious or malformed package manifest could therefore direct privileged sample-file handling to copy or write outside the configured installation root, compromising local filesystem integrity. This issue is fixed in version 2.7.8.

CVSS v3
6.0
EG Score
6.0(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity60% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 17, 2026

Advisory Details (4)

Auto-updated Sep 17, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

mport 2.7.8

Patch available: MidnightBSD/mport 2.7.8

https://github.com/MidnightBSD/mport/releases/tag/2.7.8
github_commit Patch Available

commit 36a42c8ddbd2 (MidnightBSD/mport)

Patch available: MidnightBSD/mport 2.7.8 (contains commit 36a42c8ddbd2)

https://github.com/MidnightBSD/mport/commit/36a42c8ddbd23ee9eb72c4c17596eb92cb423cf0
github_pr Patch Available

Constrain @sample destination handling to mport root

Patch available: MidnightBSD/mport 2.7.8 (PR #122 merged 2026-05-14)

https://github.com/MidnightBSD/mport/pull/122
github Patch Available

mport sample file handling can write outside the configured root · Advisory · MidnightBSD/mport · GitHub

Affected: 2.7.8

https://github.com/MidnightBSD/mport/security/advisories/GHSA-xqjc-rxmm-p27v

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 13× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-25 10:20 UTCEG score recompute
  2. 2026-09-24 14:04 UTCEPSS rescore
  3. 2026-09-24 08:28 UTCEG score recompute
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 06:37 UTCEG score recompute
  6. 2026-09-22 04:45 UTCEG score recompute
  7. 2026-09-20 01:03 UTCEG score recompute
  8. 2026-09-18 23:11 UTCEG score recompute
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-17 18:26 UTCEG score recompute
  11. 2026-09-17 17:35 UTCEG score recompute
  12. 2026-09-17 17:00 UTCEG score recompute
  13. 2026-09-17 16:59 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54585?
CVE-2026-54585 is a medium vulnerability published on September 17, 2026. mport is the MidnightBSD Package Manager. Prior to 2.7.8, createsamplefile() in libmport/bundlereadinstall_pkg.c did not constrain absolute source and destination paths from the sample-file manifest directive to mport->root. A malicious or malformed package manifest could therefore direct…
When was CVE-2026-54585 disclosed?
CVE-2026-54585 was first published in the National Vulnerability Database on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54585 actively exploited?
CVE-2026-54585 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.8% of all scored CVEs.
What is the CVSS score of CVE-2026-54585?
CVE-2026-54585 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2026-54585?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54585, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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