{"id":"EUVD-2026-84805","revision":"79bc7d599cfb4e5f86004a681f04c44d","records":[{"revision":"79bc7d599cfb4e5f86004a681f04c44d","observedAt":"2026-11-11T15:06:38.038+00:00","statement":{"source":"euvd","id":"EUVD-2026-84805","aliases":["CVE-2026-63627","GHSA-727h-3vm5-qwq6"],"title":"mppx is a TypeScript interface for machine payments protocol. Prior to 0.8.2, FeePayerPolicy in src/tempo/internal/fee-payer.ts used decodeFunctionData to validate fee-sponsored calldata but did not reject trailing bytes. A client could app…","description":"mppx is a TypeScript interface for machine payments protocol. Prior to 0.8.2, FeePayerPolicy in src/tempo/internal/fee-payer.ts used decodeFunctionData to validate fee-sponsored calldata but did not reject trailing bytes. A client could append nonzero padding that increased intrinsic calldata gas while gas_limit and max_fee_per_gas remained within policy caps, causing the server fee_payer wallet to pay substantially more than the decoded transaction required. The tested 16 KB header limit bounded the demonstrated padding to about 5,500 bytes and produced approximately five times the normal transaction fee. This issue is fixed in version 0.8.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.9,"severity":null}],"references":["https://github.com/wevm/mppx/security/advisories/GHSA-727h-3vm5-qwq6","https://github.com/wevm/mppx/pull/602","https://github.com/wevm/mppx/commit/24ddcca719ae282977d8747309ed1275ea282b25","https://github.com/wevm/mppx/releases/tag/mppx@0.8.2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84805","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 22, 2026, 7:07:02 PM","dateUpdated":"Sep 23, 2026, 2:36:37 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-84805","identifiers":["EUVD-2026-84805","CVE-2026-63627","GHSA-727h-3vm5-qwq6"]},"retained":false,"historicalAffected":[]}],"coverage":[]}