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Predictable bucket naming in Google Cloud Vertex AI Experiments

IdentifiersCVE-2026-2473CWE-340· Generation of Predictable Numbers…

CVE-2026-2473 is a bucket-squatting vulnerability in Google Cloud Vertex AI Experiments affecting Google Cloud Vertex AI from version 1.21.0 up to, but not including, 1.133.0. The issue arises from predictable Cloud Storage bucket naming used by the service or associated workflow, allowing an attacker to pre-create the expected bucket name in their own Google Cloud project before the legitimate tenant does. Because the bucket name is globally unique and predictably derived, the attacker can cause Vertex AI Experiment-related operations to interact with attacker-controlled storage. According to the provided content, successful exploitation can lead to cross-tenant remote code execution, model theft, and model poisoning.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an unauthenticated remote attacker to achieve cross-tenant compromise effects, specifically remote code execution in the affected workflow, theft of machine learning models or related artifacts, and poisoning or tampering with model data. Because the issue is cross-tenant, the impact extends beyond the attacker's own project boundary and can affect other Google Cloud customers using the vulnerable Vertex AI Experiments functionality.

Mitigation

If you can’t patch tonight, do this now.

Per the provided content, no customer action is needed because Google patched the issue. As a defense-in-depth measure, organizations can monitor for unexpected Cloud Storage buckets matching Vertex AI Experiment naming conventions and review controls around bucket creation and experiment-related storage usage, but the primary mitigation is the vendor-side fix.

Remediation

Patch, then assume compromise.

Google patched this vulnerability. The affected range is Google Cloud Vertex AI versions 1.21.0 through 1.132.x, with 1.133.0 and later not affected per the provided advisory data. The content also states that the vulnerability was patched by Google and that no customer action is needed. Where version management is applicable, ensure use of a fixed release at or above 1.133.0.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

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VendorProductType
GoogleGoogle-Cloud-Aiplatformapplication

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ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app
What this page doesn’t show

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

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Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-2473
NVD
nvd.nist.gov/vuln/detail/CVE-2026-2473
MITRE CWE · CWE-340
Generation of Predictable Numbers or Identifiers
docs.cloud.google.com
docs.cloud.google.com/support/bulletins