Vulnerability Details CVE-2026-34210
mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the stripe/charge payment method did not check Stripe's Idempotent-Replayed response header when creating PaymentIntents. An attacker could replay a valid credential containing the same spt token against a new challenge, and the server would accept the replayed Stripe PaymentIntent as a new successful payment without actually charging the customer again. This allowed an attacker to pay once and consume unlimited resources by replaying the credential. This issue has been patched in version 0.4.11.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 12.1%
CVSS Severity
CVSS v3 Score 8.1
References