CVE Intelligence

Symfony Mailomat-mailer vulnerabilities

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Published CVEs affecting Symfony Mailomat-mailer: 1 record(s), with affected versions and fixes.

CVE-2026-48747 Medium · 5.3 CWE-347 Jul 14, 2026
Symfony: Mailomat Mailer Webhook Parser Reads the HMAC Algorithm from the Request: Signature Algorithm Downgrade
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.