CVE-2026-2473Network attack vector

Cross-tenant code execution via predictable bucket names

Published Feb 20, 2026 · Updated Feb 20, 2026

Predictable bucket naming in Google Vertex AI Experiments before 1.133.0 allows remote attackers to execute code across tenants. Vertex AI Experiments derives a Cloud Storage bucket name predictably and accepts a pre-created, attacker-controlled bucket for experiment data. Exploitation requires bucket pre-creation before a victim experiment uses that name, enabling model theft, artifact poisoning, and code execution in the victim tenant.

CVSS severity7.7
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable bucket naming in Google Vertex AI Experiments before 1.133.0 allows remote attackers to execute code across tenants. Vertex AI Experiments derives a Cloud Storage bucket name predictably and accepts a pre-created, attacker-controlled bucket for experiment data. Exploitation requires bucket pre-creation before a victim experiment uses that name, enabling model theft, artifact poisoning, and code execution in the victim tenant.

The record

CVE
CVE-2026-2473
Published
Feb 20, 2026
Updated
Feb 20, 2026
Vendor
Go standard library
Product
Vertex AI Experiments
Classifications
CWE-340, CAPEC-253
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 20, 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=1.21.0 <1.133.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Vertex AI Experimentsversion=1.21.0 <1.133.0

Published CVSS scores

7.7Google CloudCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-340Generation of Predictable Numbers or Identifiers
CAPEC-253Remote Code Inclusion

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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