mport is the MidnightBSD Package Manager. Prior to 2.7.8, privileged package fetch and cache-cleaning operations used race-prone path handling across libmport/fetch.c, libmport/clean.c, libmport/util.c, libmport/bundle_read_install_pkg.c, libmport/delete_primative.c, and libexec/mport.create/mport.create.c. A local attacker with write access to a participating package cache or staging path could race path checks and replacement operations to redirect package downloads, cleanup, or install-related side effects outside the intended cache. The affected lifecycle helper paths also used shell-form invocation, increasing command-line interpretation risk during privileged helper execution. This issue is fixed in version 2.7.8.
CVE-2026-54575
MEDIUMPre-NVD 5.85.8—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% 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
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.8
- EG Score
- 5.8(medium)
- EG Risk
- 31(Track)EG Risk 31/100SSVC: 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 computedSeverity58% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 2%
- KEV
- Not listed
Published
September 17, 2026
Last Modified
September 17, 2026
Advisory Details (4)
Auto-updated Sep 17, 2026Patch available. Sources: github_commit, github_release, github, github_pr.
github_release Patch Available
mport 2.7.8
Patch available: MidnightBSD/mport 2.7.8
https://github.com/MidnightBSD/mport/releases/tag/2.7.8github_commit Patch Available
commit 29154b0fdfb5 (MidnightBSD/mport)
Patch available: MidnightBSD/mport 2.7.8 (contains commit 29154b0fdfb5)
https://github.com/MidnightBSD/mport/commit/29154b0fdfb5806568ed1277e88d942bad6d1169github_pr Patch Available
Fix security issue: TOCTOU fetch bundle and clean
Patch available: MidnightBSD/mport 2.7.8 (PR #118 merged 2026-04-23)
https://github.com/MidnightBSD/mport/pull/118github Patch Available
mport package fetch and clean paths are vulnerable to TOCTOU filesystem races · Advisory · MidnightBSD/mport · GitHub
Affected: 2.7.8
https://github.com/MidnightBSD/mport/security/advisories/GHSA-h387-g4pf-28cjWeakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 6× 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.
- 2026-09-19 21:28 UTCEG score recompute
- 2026-09-18 21:24 UTCEG score recompute
- 2026-09-18 19:28 UTCEPSS rescore
- 2026-09-17 17:35 UTCEG score recompute
- 2026-09-17 17:00 UTCEG score recompute
- 2026-09-17 16:59 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-78
- CVE-2009-20011EG 10.0CRITICAL
- CVE-2011-10017EG 10.0CRITICAL
- CVE-2012-1166EG 10.0EPSS p92HIGH
- CVE-2012-2976EG 10.0EPSS p92HIGH
- CVE-2012-2953EG 10.0EPSS p99HIGH
- CVE-2011-4502EG 10.0EPSS p92HIGH
- CVE-2011-2148EG 10.0EPSS p92HIGH
- CVE-2011-0382EG 10.0EPSS p90HIGH
- CVE-2011-0381EG 10.0EPSS p92HIGH
- CVE-2011-0372EG 10.0HIGH
Frequently asked(5)
What is CVE-2026-54575?
CVE-2026-54575 is a medium vulnerability published on September 17, 2026. mport is the MidnightBSD Package Manager. Prior to 2.7.8, privileged package fetch and cache-cleaning operations used race-prone path handling across libmport/fetch.c, libmport/clean.c, libmport/util.c, libmport/bundlereadinstallpkg.c, libmport/deleteprimative.c, and…
When was CVE-2026-54575 disclosed?
CVE-2026-54575 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-2026-54575 actively exploited?
CVE-2026-54575 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.1% of all scored CVEs.
What is the CVSS score of CVE-2026-54575?
CVE-2026-54575 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-54575?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54575, 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
Explore the affected products and dependency analysis for CVE-2026-54575
Is Your Infrastructure Affected by CVE-2026-54575?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.