CVE-2026-41009 (GCVE-0-2026-41009)

Vulnerability from cvelistv5 – Published: 2026-05-27 06:45 – Updated: 2026-05-27 13:38
VLAI
Title
Local Blobstore may allow arbitrary reads/deletes
Summary
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
Severity
5.8 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
Cloud Foundry Foundation BOSH Director Affected: 0 , < 282.1.12 (custom)
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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.\\n\\nAffected versions:\\nBOSH Director: All versions prior to v282.1.12\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"When the director sends a long-running request (e.g. compile_package), the agent\u0027s reply JSON is consumed by AgentClient. inject_compile_log (line 332-339) reads response[\u0026#39;value\u0026#39;][\u0026#39;result\u0026#39;][\u0026#39;compile_log_id\u0026#39;] and format_exception (line 318-325) reads exception[\u0026#39;blobstore_id\u0026#39;]; 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). 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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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