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GHSA-RRJ9-5Q2J-4GVR Symfony: Mailomat Mailer Webhook Parser Reads the HMAC Algorithm from the Request: Signature Algorithm Downgrade

🗓️ 15 Jun 2026 17:32:28Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 6 Views

Symfony Mailomat webhook now requires sha256 hex and constant-time HMAC-SHA256 verification; weaker algorithms rejected.

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15 Jun 2026 17:45Current
5.5Medium risk
Vulners AI Score5.5
CVSS 46.3
EPSS0.00018
6