What is CVE-2026-22689?

CVE-2026-22689 is a medium-severity vulnerability in Axllent Mailpit, classified under CWE-1385. CVSS score: 6.5/10. Published 2026-01-10.

How severe is CVE-2026-22689?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Axllent Mailpit

CVE-2026-22689

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 Hij…

EPSS: 0.000 (1.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Axllent Mailpit — versions < 1.28.2

Weakness classification (CWE)

CWE-1385

References

https://github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mm (x_refsource_CONFIRM)
https://github.com/axllent/mailpit/commit/6f1f4f34c98989fd873261018fb73830b30aec3f (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-22689?: CVE-2026-22689 is a medium-severity vulnerability in Axllent Mailpit, classified under CWE-1385. CVSS score: 6.5/10. Published 2026-01-10.
How severe is CVE-2026-22689?: Medium severity. CVSS v3 base score is 6.5 out of 10.