CVE-2026-18236 PUBLISHED

Google-ADK Continuation Forgery

Assigner: Google
Reserved: 29.07.2026 Published: 29.07.2026 Updated: 29.07.2026

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.

Metrics

CVSS Vector: 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 Score: 9.3

Product Status

Vendor Google
Product Google-ADK
Versions Default: unaffected
  • Version < 2.5.0 is affected

Credits

  • Aviyam Ivgi reporter

References

Problem Types

  • CWE-863 Incorrect Authorization CWE

Impacts

  • CAPEC-6 Argument Injection