CVE-2026-4644: Improper Authorization in Google Cloud Integration Connectors Leads to Project Takeover

Severity: high (CVSS 8.5 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-04 · updated 2026-09-08
Weakness: CWE-863

Description

A Missing Authorization vulnerability in HTTP Connector in Google Cloud Integration Connectors versions prior to 2025-12-11 on Google Cloud Platform allows an authenticated user to escalate privileges and take over a Google Cloud Project using unauthorized service account attachment. This vulnerability was patched on 11 December 2025, and no customer action is needed.

Affected products

Google Cloud Integration Connectors: before 2025-12-11 — fixed in 2025-12-11

How to fix

Upgrade to a fixed version: Google Cloud Integration Connectors 2025-12-11. Check the vendor advisory for mitigations.

References

https://docs.cloud.google.com/support/bulletins#gcp-2026-059

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