CVE-2026-73541

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Source

https://cve.org/CVERecord?id=CVE-2026-73541

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73541.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-73541

Aliases

EEF-CVE-2026-73541
GHSA-j4j7-7xpr-c7cr

Published

2026-08-19T17:20:00Z

Modified

2026-08-22T03:31:16Z

Severity

8.3 (High) CVSS_V4 - 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 CVSS Calculator

Summary

Tempo fee sponsorship in mpp bounds each transaction but not aggregate exposure, allowing concurrent sponsor-wallet drain

Details

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.

Database specific

{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73541.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "d29d54e507918db00a5b65d90136b73166c017d7"
                },
                {
                    "fixed": "ddc46868fba57ccebb567c04709812b466123076"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/zenhive/mpp

Affected ranges

Type

GIT

Repo

https://github.com/zenhive/mpp

Events

Introduced

7ca7538f05959a98e0e5e63e4bd949b4f362cf8d

Fixed

a23dabd1aa066479b3acd1915ccc1644c3b66b34

Fixed

ddc46868fba57ccebb567c04709812b466123076

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0.2.0"
        },
        {
            "fixed": "0.12.0"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

v0.*

v0.10.0

v0.11.0

v0.2.0

v0.3.0

v0.4.0

v0.5.1

v0.6.0

v0.6.1

v0.6.3

v0.6.4

v0.7.0

v0.8.0

v0.9.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73541.json"