CVE-2026-76066Network attack vectorHinoki check available

Unauthorized tool execution via registry-wide authorization

Published Oct 15, 2026 · Updated Oct 15, 2026

Authorization bypass in IntentKit 2.6.3 and earlier allows remote attackers to invoke owner-only tools through public agent interfaces. The executor validates tool calls against the full registry instead of the per-request tool set narrowed by ToolBindingMiddleware. Public WEB, API, TWITTER, or TELEGRAM access permits indirect prompt injection or reused-thread history replay to trigger restricted state changes without human approval.

CVSS severity8.7
High
EPSS probability0.39%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in IntentKit 2.6.3 and earlier allows remote attackers to invoke owner-only tools through public agent interfaces. The executor validates tool calls against the full registry instead of the per-request tool set narrowed by ToolBindingMiddleware. Public WEB, API, TWITTER, or TELEGRAM access permits indirect prompt injection or reused-thread history replay to trigger restricted state changes without human approval.

The record

CVE
CVE-2026-76066
Published
Oct 15, 2026
Updated
Oct 15, 2026
Vendor
Crestal Network
Product
IntentKit
Classifications
CWE-862, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 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 <=2.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Crestal Network · IntentKitversion=0 <=2.6.3

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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