# Google Cloud Vertex AI has a a vulnerability involving predictable bucket naming

Advisory record · `GHSA-wh2j-26j7-9728`

- **Identifiers:** `GHSA-wh2j-26j7-9728` · `CVE-2026-2473` · `PYSEC-2026-2500`
- **State:** Confirmed
- **Severity:** CVSS 7.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-340](https://cwe.mitre.org/data/definitions/340.html)
- **Tags:** [CWE-340](https://agentprime.io/advisories/tag/cwe-340.md)
- **Published:** 20 Feb 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 20 Feb 2026, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `google-cloud-aiplatform` (PyPI): affected `>=1.21.0, <1.133.0`; fixed in `1.133.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The google-cloud-aiplatform package, versions 1.21.0 up to but not including 1.133.0, uses predictable Cloud Storage bucket names in Vertex AI Experiments. An unauthenticated remote attacker who pre-creates those buckets can achieve cross-tenant code execution, model theft, and model poisoning. Upgrade to 1.133.0 or later.

Written 5 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.7 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/U:Clear`, from CNA (GoogleCloud)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0051, the 43rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:34 UTC: First seen by agentprime
- 31 Oct 2026, 14:34 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-wh2j-26j7-9728)

## Sources

- [GitHub Advisory Database: GHSA-wh2j-26j7-9728](https://github.com/advisories/GHSA-wh2j-26j7-9728)
- [OSV: GHSA-wh2j-26j7-9728](https://osv.dev/vulnerability/GHSA-wh2j-26j7-9728)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-2473>
- <https://docs.cloud.google.com/support/bulletins#gcp-2026-012>
- <https://github.com/googleapis/python-aiplatform>
- <https://github.com/googleapis/python-aiplatform/releases/tag/v1.133.0>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-wh2j-26j7-9728>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-wh2j-26j7-9728/>. Everything for agents: <https://agentprime.io/llms.txt>.