CVE-2026-73541

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.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://cna.erlef.org/cves/CVE-2026-73541.html	Third Party Advisory Mitigation
https://github.com/ZenHive/mpp/commit/ddc46868fba57ccebb567c04709812b466123076	Patch
https://github.com/ZenHive/mpp/security/advisories/GHSA-j4j7-7xpr-c7cr	Vendor Advisory
https://osv.dev/vulnerability/EEF-CVE-2026-73541	Third Party Advisory Mitigation

Configurations

Configuration 1 (hide)

cpe:2.3:a:zenhive:machine_payments_protocol:*:*:*:*:*:elixir:*:*

History

No history.

Information

Published : 2026-08-19 18:17

Updated : 2026-09-10 18:24

NVD link : CVE-2026-73541

Mitre link : CVE-2026-73541

CVE.ORG link : CVE-2026-73541

JSON object : View

Products Affected

zenhive

machine_payments_protocol

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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sponsored payments, denying service to legitimate payers once it is empty.\n\nMPP.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. 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