VDB
CVE-2026-23845
CVE-2026-23845
PUBLISHED
CVSS 5.800000190734863 MEDIUM
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.
EPSS 0.02% · 7.0th percentile
Risk Scores
CVSS v3.1
5.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
EPSS Score
0.02%
7.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | axllent/mailpit | 0, 0 |
| axllent | mailpit | < 1.28.3, 0, < 1.28.3 |
Timeline
- Jan 19, 2026 CVE Published
- Jan 20, 2026 EPSS Score
- Jan 20, 2026 CVE Updated
- Jan 23, 2026 EPSS Score
- Jan 25, 2026 EPSS Score
- Jan 28, 2026 EPSS Score
- Jan 30, 2026 Security Advisory
- Jan 31, 2026 EPSS Score
- Feb 3, 2026 EPSS Score
- Feb 5, 2026 EPSS Score
- Feb 8, 2026 EPSS Score
- Feb 11, 2026 EPSS Score
References
- https://github.com/axllent/mailpit/security/advisories/GHSA-6jxm-fv7w-rw5j url
- https://github.com/axllent/mailpit/commit/1679a0aba592ebc8487a996d37fea8318c984dfe url
- https://github.com/axllent/mailpit/releases/tag/v1.28.3 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-23845 advisory
- https://github.com/axllent/mailpit package