CVE-2026-23829

MEDIUM

5.3

Description

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.

Details CVE

Score CVSS v3.15.3

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie1/19/2026

Derniere modification2/23/2026

Sourcenvd

Observations honeypot0

Produits affectes

axllent:mailpit

Faiblesses (CWE)

CWE-93CWE-150

References

https://github.com/axllent/mailpit/commit/36cc06c125954dec6673219dafa084e13cc14534(security-advisories@github.com)

https://github.com/axllent/mailpit/releases/tag/v1.28.3(security-advisories@github.com)

https://github.com/axllent/mailpit/security/advisories/GHSA-54wq-72mp-cq7c(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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