CVE-2026-23845
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
5.8 / 10
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Vulnerability Description
Mailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery (SSRF) via HTML Check CSS Download. The HTML Check feature (`/api/v1/message/{ID}/html-check`) is designed to analyze HTML emails for compatibility. During this process, the `inlineRemoteCSS()` function automatically downloads CSS files from external `<link rel="stylesheet" href="...">` tags to inline them for testing. Version 1.28.3 fixes the issue.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-918
Source
GitHub
Vendor
go
Product
github.com/axllent/mailpit
External References
- https://github.com/axllent/mailpit/security/advisories/GHSA-6jxm-fv7w-rw5j
- https://nvd.nist.gov/vuln/detail/CVE-2026-23845
- https://github.com/axllent/mailpit/commit/1679a0aba592ebc8487a996d37fea8318c984dfe
- https://github.com/axllent/mailpit/releases/tag/v1.28.3
- https://github.com/advisories/GHSA-6jxm-fv7w-rw5j
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