🛡️ CVE-2026-22689
🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-1385 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Mailpit is an email testing tool and API for developers. Prior to version 1.28.2, the Mailpit WebSocket server is configured to accept connections from any origin. This lack of Origin header validation introduces a Cross-Site WebSocket Hijacking (CSWSH) vulnerability. An attacker can host a malicious website that, when visited by a developer running Mailpit locally, establishes a WebSocket connection to the victim's Mailpit instance (default ws://localhost:8025). This allows the attacker to intercept sensitive data such as email contents, headers, and server statistics in real-time. This issue has been patched in version 1.28.2.

Details

Severity Medium
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE CWE-1385
Public Exploit ✅ No
Source NVD
Published 2026-01-13
Updated 2026-06-15
Modified 2026-02-03

Affected Packages

Software From version Fixed in
github.com/axllent/mailpit — —
mailpit — 1.28.2

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