Local Blobstore may allow arbitrary reads/deletes_CVE-2026-41009

5.8 / 10

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:L

Description

When the director sends a long-running request (e.g. compile_package), the agent's reply JSON is consumed by AgentClient. inject_compile_log (line 332-339) reads response['value']['result']['compile_log_id'] and format_exception (line 318-325) reads exception['blobstore_id']; both pass the agent-supplied string unmodified to download_and_delete_blob(blob_id) (line 344-349), which calls @resource_manager.get_resource(blob_id) and, in an ensure block, @resource_manager.delete_resource(blob_id). Api::ResourceManager forwards the id straight to blobstore.get(id) / blobstore.delete(id). When the director is configured with the local blobstore provider, Blobstore::LocalClient#object_file_path(oid) is File.join(@blobstore_path, oid) (local_client.rb:54-56) with no normalisation, so oid = "../../jobs/director/config/director.yml" resolves outside the blobstore root.

Affected versions:
BOSH Director: All versions prior to v282.1.12

Basic Information

ID CVE-2026-41009

Source vmware

Published May 27, 2026 at 06:45

Affected Product

Vendor Cloud Foundry Foundation

Product BOSH Director

Affected Versions Cloud Foundry Foundation BOSH Director 0

CWE Classification

CWE-22

References

www.cloudfoundry.org /blog/cve-2026-41009-local-blobstore-may-allow-arbitrary-reads-deletes/

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