CVE-2026-67531Public exploitNetwork attack vectorHinoki check available

Host code execution via exposed Zod schemas

Published Aug 5, 2026 · Updated Aug 5, 2026

Code injection in AgentFront FrontMCP before 1.5.7 allows remote attackers to execute arbitrary code through codecall:execute. getTool() passes live Zod schemas into the sandbox, where the non-configurable _zod property forces the proxy membrane to expose a raw host object and its Function constructor. CodeCallPlugin must be loaded and callable; default public authentication exposes the path without credentials, and successful exploitation runs code as the server process.

CVSS severity9.3
Critical
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Code injection in AgentFront FrontMCP before 1.5.7 allows remote attackers to execute arbitrary code through codecall:execute. getTool() passes live Zod schemas into the sandbox, where the non-configurable _zod property forces the proxy membrane to expose a raw host object and its Function constructor. CodeCallPlugin must be loaded and callable; default public authentication exposes the path without credentials, and successful exploitation runs code as the server process.

The record

CVE
CVE-2026-67531
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
AgentFront
Product
FrontMCP
Classifications
CWE-94, CWE-501, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=< 1.5.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AgentFront · FrontMCPversion=< 1.5.7

Published CVSS scores

9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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 exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-501Trust Boundary Violation
T1059.007JavaScript/JScript

Public exploit references

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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