{"id":"CVE-2026-34210","aliases":["GHSA-8mhj-rffc-rcvw"],"url":"https://o3.security/vulnerability/CVE-2026-34210","summary":"mppx has Stripe charge credential replay via missing idempotency check","details":"### Impact\n\nThe `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.\n\n### Patches\n\nFixed in 0.4.11. The server now checks the `Idempotent-Replayed` header and rejects replayed PaymentIntents.\n\n### Workarounds\n\nThere are no workarounds available for this vulnerability.","published":"2026-03-31T14:10:10.463Z","modified":"2026-08-12T03:51:36.012140723Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"mppx","fixedVersion":"0.4.11"}],"fix":{"url":"https://github.com/wevm/mppx/commit/b2b1a0b60506fc71aa80b8a025084949dca1a994","label":"wevm/mppx@b2b1a0b"},"references":[{"type":"WEB","url":"https://github.com/wevm/mppx/releases/tag/mppx@0.4.11"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34210.json"},{"type":"ADVISORY","url":"https://github.com/wevm/mppx/security/advisories/GHSA-8mhj-rffc-rcvw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34210"},{"type":"FIX","url":"https://github.com/wevm/mppx/commit/b2b1a0b60506fc71aa80b8a025084949dca1a994"},{"type":"PACKAGE","url":"https://github.com/wevm/mppx"},{"type":"WEB","url":"https://github.com/wevm/mppx/releases/tag/mppx%400.4.11"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:36.012140723Z"}}