CVE-2026-44583: Paymenter has Blind Unauthenticated SSRF on the Paypal gateway module

June 22, 2026

The PayPal webhook endpoint /extensions/paypal/webhook processes the PAYPAL-CERT-URL HTTP header without validation, allowing attackers to control server-side HTTP request destinations.

References

github.com/Paymenter/Paymenter/security/advisories/GHSA-7wwh-xcc3-9fcg
github.com/advisories/GHSA-7wwh-xcc3-9fcg
nvd.nist.gov/vuln/detail/CVE-2026-44583

Code Behaviors & Features

Detect and mitigate CVE-2026-44583 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →