CVE-2026-34210 json
mppx has Stripe charge credential replay via missing idempotency check
published 2026-03-29 7 mo ago modified 2026-07-24 3 mo ago also GHSA-8mhj-rffc-rcvw , EUVD-2026-17457
- cvss
- 8.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm mppx 0.4.11
- wevm mppx 0.4.11
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | mppx | <0.4.11 |
0.4.11 |
Affected products
- wevm mppx
Classification
- Weakness
-
- CWE-697 Incorrect Comparison
References
-
github.com
/wevm/mppx/commit/b2b1a0b60506fc71aa80b8a025084949dca1a994
web, patch
-
github.com
/wevm/mppx/security/advisories/GHSA-8mhj-rffc-rcvw
web, patch, vendor-advisory
-
github.com
/wevm/mppx/releases/tag/mppx@0.4.11
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-34210
advisory
-
github.com
/wevm/mppx
package
-
github.com
/wevm/mppx/releases/tag/mppx%400.4.11
web
Sources
- CVE List CVE-2026-34210
- GitHub Advisory GHSA-8mhj-rffc-rcvw
- NVD CVE-2026-34210
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