Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| wevm | mppx | affected |
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Tue, 22 Sep 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | mppx: Gas Draining with padding | |
| Weaknesses | CWE-20 | |
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| Metrics |
cvssV4_0
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-09-22T19:07:02.984Z
Reserved: 2026-07-17T14:11:15.482Z
Link: CVE-2026-63627
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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