CVE-2026-18236
Published:July 29, 2026
Updated:August 06, 2026
A vulnerability in the Agent Development Kit (ADK) allows for continuation forgery in tool confirmations. An attacker who is able to manipulate or inject events into the session history can execute unauthorized tools by forging a tool confirmation response. This is possible because the framework did not verify if the target tool was registered to the executing agent, did not validate if the tool actually required confirmation, and did not match the confirmation arguments against the original tool call event in the history.
Affected Packages
google-adk (CONDA):
Affected version(s) >=2.1.0 <2.5.0Fix Suggestion:
Update to version 2.5.0https://github.com/google/adk-python.git (GITHUB):
Affected version(s) >=v2.0.0 <v2.5.0Fix Suggestion:
Update to version v2.5.0google-adk (PYTHON):
Affected version(s) >=2.0.0b1 <2.5.0Fix Suggestion:
Update to version 2.5.0Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
Exploit Maturity
POC
CVSS v3
Base Score:
10
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.20