CVE•Published 2026-03-31•Modified 2026-07-24•1 article on news•4 live references•NVD data

CVE-2026-34210Wevm · Mppx

Vulnerability data via NVD (ingested)

CVSS v3.1

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 61% of all CVEs

Weaknesses (CWE)

CWE-697Incorrect Comparison

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.

Timeline

Published 2026-03-31

Modified 2026-07-24

External references

NVD MITRE Exploit-DB VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-34210

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Wevm Mppx"

All exposed Wevm Mppx instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Mppx"

HTTP body or banner mentions "Mppx" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-34210