---
cve: "CVE-2026-45711"
severity: "MEDIUM"
cvss: 5.9
epss: "31%"
vendor: "axllent"
kev: false
exploited: false
published: "2026-07-20 14:39:06"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T10:57:00+02:00"
---

# CVE-2026-45711

> 5.9 MEDIUM · 🧪 PoC

## Beschreibung

Mailpit is an email testing tool and API for developers. Prior to version 1.30.0, the mailpit dump --http   sub-command downloads every message from a remote Mailpit instance and writes each one as .eml inside the user-supplied output directory. The message ID field is taken verbatim from the JSON response of the remote server and concatenated into the output path with path.Join, which silently normalizes `..` segments. A malicious HTTP server impersonating Mailpit can therefore make mailpit dump write attacker-controlled bytes to any path the running user can write, fully outside the intended output directory. Version 1.30.0 contains a patch.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- af8756a32cf7ecf06bef109c1348b783f1a239ee (Commit)

## Referenzen

- <https://github.com/axllent/mailpit/security/advisories/GHSA-qx5x-85p8-vg4j>
- <https://github.com/axllent/mailpit/releases/tag/v1.30.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-45711) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_