CVE-2026-59695

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Source

https://cve.org/CVERecord?id=CVE-2026-59695

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59695.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-59695

Aliases

EEF-CVE-2026-59695
GHSA-vv77-66rf-pm86

Published

2026-07-17T10:11:43.674Z

Modified

2026-07-19T03:46:37.437180267Z

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

Unbounded max_fee_per_gas in mpp Tempo fee-payer enables single-request wallet drain

Details

Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to drain the fee-payer wallet in a single request by naming an arbitrarily high gas price.

When the mpp Elixir library is configured as fee payer (feepayer: true), MPP.Tempo.Transaction.cosignfeepayer/3 re-signs the client-supplied base fields of the 0x76 AASigned envelope verbatim, including maxfeepergas and maxpriorityfeepergas, without validating that they are within reasonable bounds. A malicious client embeds arbitrarily large values for these fields in the signed envelope. The server co-signs and broadcasts the transaction. The effectivegasprice billed against the fee-payer wallet is derived from the attacker-supplied ceilings, so the server pays those inflated per-gas rates out of its own wallet. A single crafted request can drain the wallet entirely, after which the server can no longer sponsor gas for legitimate payment requests.

This issue affects mpp: from 0.2.0 before 0.6.0.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59695.json",
    "cna_assigner": "EEF",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "d29d54e507918db00a5b65d90136b73166c017d7"
                },
                {
                    "fixed": "5d6338e2334084c5f2a78cfcca474830733ed7e8"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-1284"
    ]
}

References

Affected packages

Git / github.com/zenhive/mpp

Affected ranges

Type

GIT

Repo

https://github.com/zenhive/mpp

Events

Introduced

7ca7538f05959a98e0e5e63e4bd949b4f362cf8d

Fixed

422bcdd066d1457a93bf5e75fd55e71c5e0be961

Fixed

5d6338e2334084c5f2a78cfcca474830733ed7e8

Database specific

{
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0.2.0"
        },
        {
            "fixed": "0.6.0"
        }
    ]
}

Affected versions

v0.*

v0.2.0

v0.3.0

v0.4.0

v0.5.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59695.json"