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CVE-2026-67581— On-chain transfer proof is not single-use in mpp EVM payment method, enabling cross-challenge replay

Quick assessment

Affected
ZenHive mpp
Exploitation
Public or AI PoC available; prioritize validation
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 0.3.0至0.6.3之前版本存在授权问题漏洞，该漏洞源于对交易哈希凭证的验证不充分，未将证明绑定到具体挑战或使用记录，可导致捕获重放身份验证绕过，使未经身份验证的远程客户端通过重放已结算的链上转账获取付费资源。

CVSS 8.7 · High EPSS 0.50% · P41

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 2

VendorProduct Version RangeStatus
ZenHive mpp 0.3.0< 0.6.3 affected
65b9e425ce27631c786a5b380b5e4c5ae607ec6d< ecc038088b1cda09ad8a84acc6cc112addb4a68f affected
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I. Basic Information for CVE-2026-67581

Vulnerability Information
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Vulnerability Title
On-chain transfer proof is not single-use in mpp EVM payment method, enabling cross-challenge replay
Source: CVE Program / CVE List V5
Vulnerability Description
Authentication Bypass by Capture-replay in ZenHive mpp allows an unauthenticated remote client to obtain paid resources by resubmitting one settled on-chain transfer. MPP.Methods.EVM.verify/2 accepts a transaction-hash credential and matches a transfer purely on token, to and amount (ERC-20) or to and value (native). It binds the proof neither to the challenge being verified nor to any record of prior use, and the generic MPP.Plug dedup store keys on challenge.id, which is regenerated for every 402 response. On a static-price route, a single historical transfer matching the charge therefore satisfies an unbounded number of later charges, including transfers an attacker can read off a public block explorer. This issue affects mpp: from 0.3.0 before 0.6.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
ZenHive MPP 授权问题漏洞
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 0.3.0至0.6.3之前版本存在授权问题漏洞，该漏洞源于对交易哈希凭证的验证不充分，未将证明绑定到具体挑战或使用记录，可导致捕获重放身份验证绕过，使未经身份验证的远程客户端通过重放已结算的链上转账获取付费资源。
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 0.3.0 ~ 0.6.3 cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*
ZenHive mpp 65b9e425ce27631c786a5b380b5e4c5ae607ec6d ~ ecc038088b1cda09ad8a84acc6cc112addb4a68f cpe:2.3:a:ZenHive:mpp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-67581

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10632 chars
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III. Intelligence Information for CVE-2026-67581

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Patches & Fixes for CVE-2026-67581 (1)

Vendor Advisories for CVE-2026-67581 (2)

News Coverage for CVE-2026-67581 (1)

Same Patch Batch · ZenHive · 2026-08-19 · 4 CVEs total

CVE-2026-73541 8.3 HIGH Tempo fee sponsorship in mpp bounds each transaction but not aggregate exposure, allowing
CVE-2026-73136 8.2 HIGH Static memo configuration in mpp Tempo disables per-challenge attribution binding, enablin
CVE-2026-73829 6.3 MEDIUM Non-atomic hash-credential dedup in mpp Tempo allows replay of a confirmed payment under a

IV. Related Vulnerabilities

Same product: mpp
Same vendor: ZenHive
Same weakness: CWE-294

V. Comments for CVE-2026-67581

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