Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-82750— Unbounded EIP-7702 authorization list in mpp Tempo fee-payer sponsorship inflates gas cost and sponsors account delegation

Quick assessment

Affected
ZenHive mpp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ZenHive MPP是ZenHive组织开源的一款嵌入式服务器。 ZenHive MPP 0.2.0版本至0.16.1之前版本存在输入验证错误漏洞，该漏洞源于对输入中指定数量的验证不当，未读取aa_authorization_list字段，可能导致未经身份验证的远程客户端通过附加EIP-7702账户委托，大幅增加费用支付者的gas成本，并让赞助商为其付费，甚至升级自身账户到委托代码。

CVSS 8.3 · High EPSS 0.33% · P26

Possible ATT&CK Techniques 1 AI

T1531 · Account Access Removal

Affected Version Matrix 2

VendorProduct Version RangeStatus
ZenHive mpp 0.2.0< 0.16.1 affected
d29d54e507918db00a5b65d90136b73166c017d7< 0482572b47e1ffe1537ab80ab613d47b92833c2d affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-82750

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Unbounded EIP-7702 authorization list in mpp Tempo fee-payer sponsorship inflates gas cost and sponsors account delegation
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to inflate the fee-payer's gas cost per sponsored payment by a large multiplier and to have the sponsor pay for EIP-7702 account delegations of the client's choosing. When the server sponsors Tempo payments, MPP.Methods.Tempo.FeePayerPolicy.measure/3 in lib/mpp/methods/tempo/fee_payer_policy.ex bounds the gas fields, the fee budget, the validity window and the access list of the client-signed 0x76 envelope, but never reads its aa_authorization_list field. Every signed delegation in that list is charged as intrinsic gas before the payment call runs, so a client attaching delegations from throwaway authority keys makes the sponsor pay for them within the default gas_limit ceiling. At the reporter's default of seven entries the sponsored cost rises from about 46,575 gas to about 1,884,087 gas. Because each entry is applied as a persistent set-code delegation, a client can also upgrade its own accounts to delegated code at the sponsor's expense. This issue affects mpp: from 0.2.0 before 0.16.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5
Vulnerability Title
ZenHive MPP 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ZenHive MPP是ZenHive组织开源的一款嵌入式服务器。 ZenHive MPP 0.2.0版本至0.16.1之前版本存在输入验证错误漏洞，该漏洞源于对输入中指定数量的验证不当，未读取aa_authorization_list字段，可能导致未经身份验证的远程客户端通过附加EIP-7702账户委托，大幅增加费用支付者的gas成本，并让赞助商为其付费，甚至升级自身账户到委托代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ZenHive mpp 0.2.0 ~ 0.16.1 cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*
ZenHive mpp d29d54e507918db00a5b65d90136b73166c017d7 ~ 0482572b47e1ffe1537ab80ab613d47b92833c2d cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-82750

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-82750

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-82750 (2)

Other References for CVE-2026-82750 (1)

IV. Related Vulnerabilities

Same product: mpp
Same vendor: ZenHive
Same weakness: CWE-1284

V. Comments for CVE-2026-82750

No comments yet

Leave a comment