CVE-2026-45754

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (6)

Core 6

Scores

CVSS v3 5.3
EPSS 0.0035
EPSS Percentile 27.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-287 CWE-306
Status published
Products (9)
sensiolabs/symfony 6.4.0 - 6.4.40
symfony/lox24-notifier >= 7.1.0-BETA1, < 7.4.12
symfony/lox24-notifier >= 8.0.0-BETA1, < 8.0.12
symfony/mailjet-mailer >= 6.4.0, < 6.4.40
symfony/mailjet-mailer >= 7.0.0-BETA1, < 7.4.12
symfony/mailjet-mailer >= 8.0.0-BETA1, < 8.0.12
symfony/symfony >= 6.4.0, < 6.4.40
symfony/symfony >= 7.0.0-BETA1, < 7.4.12
symfony/symfony >= 8.0.0-BETA1, < 8.0.12
Published Jul 14, 2026
Tracked Since Jul 15, 2026