CVE-2026-2244: Sensitive Data Exposure in Google Cloud Vertex AI Workbench

Severity: high (CVSS 8.4 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-26 · updated 2026-06-17
Weakness: CWE-200

Description

A vulnerability in Google Cloud Vertex AI Workbench from 7/21/2025 to 01/30/2026 allows an attacker to exfiltrate valid Google Cloud access tokens of other users via abuse of a built-in startup script. All instances after January 30th, 2026 have been patched to protect from this vulnerability. No user action is required for this.

Affected products

Google Cloud Vertex AI Workbench: from 7/21/2025 before 01/30/2026 — fixed in 01/30/2026

How to fix

Upgrade to a fixed version: Google Cloud Vertex AI Workbench 01/30/2026. Check the vendor advisory for mitigations.

References

https://docs.cloud.google.com/vertex-ai/docs/workbench/release-notes#February_20_2026

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