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CVE PROGRAM SOURCE RECORD6.9 Medium

CVE-2026-45755

Symfony: Mailtrap Mailer Webhook Parser Never Verifies the X-Mt-Signature HMAC — Unauthenticated Webhook Event Injection

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4.12 and 8.0.12, MailtrapRequestParser::doParse() received the configured webhook secret but ignored the X-Mt-Signature HMAC header, allowing unauthenticated POST requests to inject forged Mailtrap delivery, bounce, open, click, or spam events. This issue is fixed in versions 7.4.12 and 8.0.12.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

symfony symfony

  • >= 7.2.0, < 7.4.12affected
  • >= 8.0.0-BETA1, < 8.0.12affected

/mailtrap-mailer mailtrap-mailer

  • >= 7.2.0, < 7.4.12affected
  • >= 8.0.0-BETA1, < 8.0.12affected

References