---
cve: "CVE-2026-54576"
severity: "MEDIUM"
cvss: 5.8
epss: "0.1%"
vendor: "MidnightBSD"
kev: false
exploited: false
published: "2026-09-17 17:16:42"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T13:54:09+02:00"
---

# CVE-2026-54576

> 5.8 MEDIUM · 🧪 PoC

## Beschreibung

mport is the MidnightBSD Package Manager. Prior to 2.7.8, do_actual_install() in libmport/bundle_read_install_pkg.c used path-based lstat(), chown(), stat(), and chmod() operations while installing package files. A local attacker with write access to a target directory could replace a checked file with a symlink before privileged ownership or mode changes were applied, redirecting those changes to an attacker-selected path and compromising filesystem integrity or permissions. This issue is fixed in version 2.7.8.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 4676ac05b1056b54a3d38d03ae8a478bf12c9abe (Commit)
- 899c8fe2d3ceb25d899e70dbd0c7744b7d7a0946 (Commit)

## Referenzen

- <https://github.com/MidnightBSD/mport/security/advisories/GHSA-23g3-7fv3-3ccf>
- <https://github.com/MidnightBSD/mport/pull/150>
- <https://github.com/MidnightBSD/mport/commit/4676ac05b1056b54a3d38d03ae8a478bf12c9abe>
- <https://github.com/MidnightBSD/mport/releases/tag/2.7.8>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-54576) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_