VULNERABILITY INTELLIGENCE

CVE-2026-48747

CVSS score6.3 MEDIUM

EPSS probability0.25%

CISA KEVNot currently listed

Published2026-07-14

Last modified2026-07-15

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4.13 and 8.0.13, MailomatRequestParser::validateSignature() parsed X-MOM-Webhook-Signature as algo=signature and passed the request-selected algorithm to hash_hmac(), allowing a signature algorithm downgrade instead of enforcing Mailomat's documented SHA-256 webhook signature. This issue is fixed in versions 7.4.13 and 8.0.13.