CVE-2026-82750Network attack vector

Sponsored delegation and gas-cost inflation via unchecked list

Published Sep 6, 2026 · Updated Sep 8, 2026

Improper input validation in ZenHive MPP 0.2.0 through 0.16.0 allows remote attackers to inflate sponsored gas costs. The Tempo FeePayerPolicy.measure/3 routine bounds other client-controlled 0x76 envelope fields but never reads aa_authorization_list, so every attached EIP-7702 delegation adds intrinsic gas. Only deployments with Tempo server-side fee sponsorship enabled are affected; attackers can consume sponsor funds and obtain persistent delegated code on controlled accounts.

CVSS severity8.3
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in ZenHive MPP 0.2.0 through 0.16.0 allows remote attackers to inflate sponsored gas costs. The Tempo FeePayerPolicy.measure/3 routine bounds other client-controlled 0x76 envelope fields but never reads aa_authorization_list, so every attached EIP-7702 delegation adds intrinsic gas. Only deployments with Tempo server-side fee sponsorship enabled are affected; attackers can consume sponsor funds and obtain persistent delegated code on controlled accounts.

The record

CVE
CVE-2026-82750
Published
Sep 6, 2026
Updated
Sep 8, 2026
Vendor
ZenHive
Product
MPP
Classifications
CWE-1284, CWE-20, CAPEC-130, T1657
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.2.0 <0.16.1
  2. Affected versionversion=d29d54e507918db00a5b65d90136b73166c017d7 <0482572b47e1ffe1537ab80ab613d47b92833c2d

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ZenHive · MPPversion=0.2.0 <0.16.1; version=d29d54e507918db00a5b65d90136b73166c017d7 <0482572b47e1ffe1537ab80ab613d47b92833c2d

Published CVSS scores

8.3Erlang Ecosystem Foundation CNACVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
CWE-20Improper Input Validation
CAPEC-130Excessive Allocation
T1657Financial Theft

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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