CVE-2026-48747 (GCVE-0-2026-48747)
Vulnerability from cvelistv5
Published
2026-07-14 19:16
Modified
2026-07-15 14:22
Severity ?
6.3 (Medium) - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
  • CWE-757 - Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
Summary
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.
References
Impacted products
Vendor Product Version
symfony symfony Version: >= 7.2.0, < 7.4.12
Version: >= 8.0.0-BETA1, < 8.0.13
 Create a notification for this product.
   symfony mailomat-mailer Version: >= 7.2.0, < 7.4.12
Version: >= 8.0.0-BETA1, < 8.0.13
 Create a notification for this product.
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