CVE-2026-18236 Google-ADK Continuation Forgery
Attackers can execute unauthorized tools by forging confirmation responses due to missing validation of tool registration and arguments in Google ADK.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18236?
CVE-2026-18236 is a critical missing authorization vulnerability in Google-ADK, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-863
Which versions are affected by CVE-2026-18236?
How do I fix CVE-2026-18236?
No fix has been published for CVE-2026-18236 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18236 being exploited?
There is no known exploitation of CVE-2026-18236 in the wild and no public exploit code.
Sources
Also known as GHSA-8qg5-x5vm-75jx.