What is CVE-2026-23845?

CVE-2026-23845 is a medium-severity vulnerability in Axllent Mailpit, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-01-19.

How severe is CVE-2026-23845?

Medium severity. CVSS v3 base score is 5.8 out of 10.

SSRF in Axllent Mailpit

CVE-2026-23845

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 a…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (6.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

Affected products

Axllent Mailpit — versions < 1.28.3

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

https://github.com/axllent/mailpit/security/advisories/GHSA-6jxm-fv7w-rw5j (x_refsource_CONFIRM)
https://github.com/axllent/mailpit/commit/1679a0aba592ebc8487a996d37fea8318c984dfe (x_refsource_MISC)
https://github.com/axllent/mailpit/releases/tag/v1.28.3 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-23845?: CVE-2026-23845 is a medium-severity vulnerability in Axllent Mailpit, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-01-19.
How severe is CVE-2026-23845?: Medium severity. CVSS v3 base score is 5.8 out of 10.