---
cve: "CVE-2026-67448"
severity: "MEDIUM"
cvss: 6.5
epss: "3.7%"
vendor: "axllent"
kev: false
exploited: false
published: "2026-08-20 22:17:56"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T06:08:21+02:00"
---

# CVE-2026-67448

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures websocket.Upgrader.CheckOrigin to return true. A malicious website can request /%61pi/events, skip corsOriginAccessControl(), reach the /api/events WebSocket handler, and receive live message IDs, Message-Id values, sender and recipient fields, subjects, tags, and body snippets from an unauthenticated default Mailpit instance after the user visits the site. This is a regression of the earlier WebSocket origin protection and does not affect deployments protected by --ui-auth-file. This issue is fixed in version 1.30.6.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- fbe5e006c3f1682b819df58b4a932d7a84920be9 (Commit)
- a58a22122eb5259b24e34bd33b7274d046606364 (Commit)

## Referenzen

- <https://github.com/axllent/mailpit/security/advisories/GHSA-8r62-w5wh-fc5m>
- <https://github.com/axllent/mailpit/commit/fbe5e006c3f1682b819df58b4a932d7a84920be9>
- <https://github.com/axllent/mailpit/releases/tag/v1.30.6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-67448) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_