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CVE-2026-45754GHSA-64HG-93W9-FC35

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.4.40, 7.4.12, 8.0.12
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • symfony symfony

    From 6.4.0 · fixed in 6.4.40; From 7.0.0-BETA1 · fixed in 7.4.12; From 8.0.0-BETA1 · fixed in 8.0.12

  • symfony lox24-notifier

    From 7.1.0-BETA1 · fixed in 7.4.12; From 8.0.0-BETA1 · fixed in 8.0.12

  • symfony mailjet-mailer

    From 6.4.0 · fixed in 6.4.40; From 7.0.0-BETA1 · fixed in 7.4.12; From 8.0.0-BETA1 · fixed in 8.0.12

  • symfony/lox24-notifierPackagist

    From 7.1.0 · fixed in 7.4.12

  • symfony/lox24-notifierPackagist

    From 8.0.0 · fixed in 8.0.12

  • symfony/symfonyPackagist

    From 6.4.0 · fixed in 6.4.40

  • symfony/symfonyPackagist

    From 7.0.0 · fixed in 7.4.12

  • symfony/symfonyPackagist

    From 8.0.0 · fixed in 8.0.12

  • symfony/mailjet-mailerPackagist

    From 6.4.0 · fixed in 6.4.40

  • symfony/mailjet-mailerPackagist

    From 7.0.0 · fixed in 7.4.12

  • symfony/mailjet-mailerPackagist

    From 8.0.0 · fixed in 8.0.12

References 6

GitHub · symfony/symfony