Catégories
CVE-2026-23829

Mailpit has SMTP Header Injection via Regex Bypass

Résumé

Mailpit has SMTP Header Injection via Regex Bypass

Description d'origine

La description telle que publiée par la source (souvent en anglais).

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.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

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