CVE-2026-34210HIGH 8.1EPSS p38.4%

CVE-2026-34210CVE-2026-34210

Description

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS0.49% probability of exploitation · percentile 38.4% · 2026-06-19T12:03:05Z
Published2026-03-31
Last modified2026-04-03

Underlying weaknesses· 1

CWE-697

References

  1. https://github.com/wevm/mppx/commit/b2b1a0b60506fc71aa80b8a025084949dca1a994
  2. https://github.com/wevm/mppx/releases/tag/mppx@0.4.11
  3. https://github.com/wevm/mppx/security/advisories/GHSA-8mhj-rffc-rcvw

1

TypeTargetConfidenceTier
WeaknessIncorrect Comparisoncwe-6970%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.