{"apiVersion":"1.0","identifier":"CVE-2026-73541","description":"Allocation of Resources Without Limits or Throttling in ZenHive mpp allows an unauthenticated remote client to drain the fee-payer wallet through concurrent sponsored payments, denying service to legitimate payers once it is empty. MPP.Methods.Tempo.FeePayerPolicy enforces its ceilings (max_gas, max_fee_per_gas, max_priority_fee_per_gas, the worst-case gas_limit * max_fee_per_gas <= max_total_fee budget cap, and a validity window) against one transaction at a time, and nothing accounts for exposure across concurrent requests. reserve_hash_atomic/2 is keyed on the transaction hash, so it prevents duplicate broadcast of the same signed transaction but not N distinct sponsored transactions carrying distinct expiring nonces. Committed sponsor exposure is therefore N times max_total_fee, bounded by nothing in the library, and the default 900 second validity window lets co-signed transactions stay broadcastable and uncounted for that entire period. This issue affects mpp: from 0.2.0 before 0.12.0.","publishedAt":"2026-08-19T18:17:25","lastModifiedAt":"2026-08-20T13:02:12","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73541","cvssScore":8.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/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","epssProbability":0.00419,"riskScore":0.86,"affectedProduct":"mpp","affectedVersions":">=0.2.0,<0.12.0","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-73541","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-73541","en":"https://www.redsauce.net/en/cves/CVE-2026-73541","fr":"https://www.redsauce.net/fr/cves/CVE-2026-73541","pt":"https://www.redsauce.net/pt/cves/CVE-2026-73541","de":"https://www.redsauce.net/de/cves/CVE-2026-73541","sk":"https://www.redsauce.net/sk/cves/CVE-2026-73541","el":"https://www.redsauce.net/el/cves/CVE-2026-73541"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-73541"}}