Mailpit is an email testing tool and API for developers. Versions 1.28.0 and below have a Server-Side Request Forgery (SSRF) vulnerability in the /proxy endpoint, allowing attackers to make requests to internal network resources. The /proxy endpoint validates http:// and https:// schemes, but it does not block internal IP addresses, enabling attackers to access internal services and APIs. This vulnerability is limited to HTTP GET requests with minimal headers. The issue is fixed in version 1.28.1.
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History
Thu, 08 Jan 2026 20:15:00 +0000
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ssvc
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Wed, 07 Jan 2026 23:45:00 +0000
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| Description | Mailpit is an email testing tool and API for developers. Versions 1.28.0 and below have a Server-Side Request Forgery (SSRF) vulnerability in the /proxy endpoint, allowing attackers to make requests to internal network resources. The /proxy endpoint validates http:// and https:// schemes, but it does not block internal IP addresses, enabling attackers to access internal services and APIs. This vulnerability is limited to HTTP GET requests with minimal headers. The issue is fixed in version 1.28.1. | |
| Title | Mailpit Proxy Endpoint is Vulnerable to Server-Side Request Forgery (SSRF) | |
| Weaknesses | CWE-918 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-01-08T19:23:22.033Z
Reserved: 2026-01-05T16:44:16.367Z
Link: CVE-2026-21859
Updated: 2026-01-08T19:23:13.440Z
Status : Awaiting Analysis
Published: 2026-01-08T00:16:00.150
Modified: 2026-01-08T20:15:45.567
Link: CVE-2026-21859
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OpenCVE Enrichment
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