CVE-2026-4764: Privilege Escalation in Dialogflow CX via Playbook Import

Severity: critical (CVSS 9.4 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-11 · updated 2026-10-26
Weakness: CWE-862

Description

A Missing Authorization vulnerability in the playbook import functionality in Dialogflow CX on Google Cloud Platform allows an authenticated user with specific roles to escalate privileges and potentially take over a GCP project using a maliciously crafted playbook import. This vulnerability was patched on 15 March 2026, and no customer action is needed.

Affected products

Google Cloud Dialogflow CX: before 2026-03-15 — fixed in 2026-03-15

How to fix

Upgrade to a fixed version: Google Cloud Dialogflow CX 2026-03-15. Check the vendor advisory for mitigations.

References

https://docs.cloud.google.com/dialogflow/docs/release-notes#May_07_2026

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