Mailpit is an email testing tool and API for developers. Prior to version 1.28.3, Mailpit's SMTP server is vulnerable to Header Injection due to an insufficient Regular Expression used to validate `RCPT TO` and `MAIL FROM` addresses. An attacker can inject arbitrary SMTP headers (or corrupt existing ones) by including carriage return characters (`\r`) in the email address. This header injection occurs because the regex intended to filter control characters fails to exclude `\r` and `\n` when used inside a character class. Version 1.28.3 fixes this issue.
Mailpit References: https://rosecurify.com/advisories/RO-26-002-mailpit-smtp-header-injection/ https://github.com/axllent/mailpit/security/advisories/GHSA-54wq-72mp-cq7c Remediation: Upgrade Mailpit to version 1.28.3 or later which updates the regex to explicitly exclude all ASCII control characters (\x00-\x1f) from email addresses.
10 assets checked · domain, subdomain, ipv4
S4E maps published CVEs to scanners and forecasts the next disclosure window for your stack.
Create a free account →