CVE-2026-18236Network attack vector

Unauthorized tool execution via forged confirmations

Published Jul 29, 2026 · Updated Jul 29, 2026

Incorrect authorization in Google Agent Development Kit before 2.5.0 allows remote attackers to execute unauthorized tools via forged confirmations. The request_confirmation processor trusted confirmation targets without verifying tool registration, confirmation requirements, or exact call-name and argument matches against session history. Exploitation requires the ability to manipulate or inject session events; resulting actions are limited by the tools and privileges available to the agent.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Google Agent Development Kit before 2.5.0 allows remote attackers to execute unauthorized tools via forged confirmations. The request_confirmation processor trusted confirmation targets without verifying tool registration, confirmation requirements, or exact call-name and argument matches against session history. Exploitation requires the ability to manipulate or inject session events; resulting actions are limited by the tools and privileges available to the agent.

The record

CVE
CVE-2026-18236
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
Go standard library
Product
Agent Development Kit (ADK)
Classifications
CWE-863
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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=< 2.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Agent Development Kit (ADK)version=< 2.5.0

Published CVSS scores

9.3Google Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

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-863Incorrect Authorization

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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