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.
References
| Link | Resource |
|---|---|
| https://github.com/axllent/mailpit/commit/6f1f4f34c98989fd873261018fb73830b30aec3f | Patch |
| https://github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mm | Exploit Mitigation Vendor Advisory |
Configurations
History
18 Feb 2026, 17:45
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/axllent/mailpit/commit/6f1f4f34c98989fd873261018fb73830b30aec3f - Patch | |
| References | () https://github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mm - Exploit, Mitigation, Vendor Advisory | |
| CPE | cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:* | |
| First Time |
Axllent mailpit
Axllent |
10 Jan 2026, 06:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-10 06:15
Updated : 2026-02-18 17:45
NVD link : CVE-2026-22689
Mitre link : CVE-2026-22689
CVE.ORG link : CVE-2026-22689
JSON object : View
Products Affected
axllent
- mailpit
CWE
CWE-1385
Missing Origin Validation in WebSockets