CVE-2026-19407Public exploitNetwork attack vectorHinoki check available

Remote code execution via unverified staging bucket

Published Sep 15, 2026 · Updated Sep 15, 2026

Bucket squatting in Google Cloud Agent Platform SDK for Python before 1.165.1 allows remote attackers to execute code in model serving. The stage_local_data_in_gcs() path in gcs_utils.py derives a predictable default bucket name and accepts an existing bucket without verifying ownership, letting an attacker replace uploaded model artifacts. Exploitation requires a new regional default bucket, no explicit staging_bucket, knowledge of the project ID, and winning the replacement race before the service agent loads the poisoned model; execution can expose its tenant-project token.

CVSS severityUnavailable
Unscored
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Bucket squatting in Google Cloud Agent Platform SDK for Python before 1.165.1 allows remote attackers to execute code in model serving. The stage_local_data_in_gcs() path in gcs_utils.py derives a predictable default bucket name and accepts an existing bucket without verifying ownership, letting an attacker replace uploaded model artifacts. Exploitation requires a new regional default bucket, no explicit staging_bucket, knowledge of the project ID, and winning the replacement race before the service agent loads the poisoned model; execution can expose its tenant-project token.

The record

CVE
CVE-2026-19407
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Google Cloud
Product
Agent Platform SDK for Python
Classifications
T1195.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.16.0 <1.165.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Agent Platform SDK for Pythonversion=1.16.0 <1.165.1

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1195.002Compromise Software Supply Chain

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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