CVE-2026-41009

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