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CVE PROGRAM SOURCE RECORD6.9 Medium

CVE-2026-45754

Symfony: Mailjet Mailer Webhook Parser Never Verifies the Configured Secret — Unauthenticated Webhook Event Injection

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, the Mailjet mailer bridge and LOX24 notifier bridge webhook parsers received configured webhook secrets but did not verify them, allowing unauthenticated POST requests to inject forged Mailjet and LOX24 event payloads. This issue is fixed in versions 6.4.40, 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

  • >= 6.4.0, < 6.4.40affected
  • >= 7.0.0-BETA1, < 7.4.12affected
  • >= 8.0.0-BETA1, < 8.0.12affected

symfony lox24-notifier

  • >= 7.1.0-BETA1, < 7.4.12affected
  • >= 8.0.0-BETA1, < 8.0.12affected

symfony mailjet-mailer

  • >= 6.4.0, < 6.4.40affected
  • >= 7.0.0-BETA1, < 7.4.12affected
  • >= 8.0.0-BETA1, < 8.0.12affected

References