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CVE-2026-41009— Local Blobstore may allow arbitrary reads/deletes

Quick assessment

Affected
Cloud Foundry Foundation BOSH Director
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cloud Foundry BOSH Director是美国Cloud Foundry公司的一个云基础设施部署与生命周期管理平台。 Cloud Foundry BOSH Director存在安全漏洞，该漏洞源于AgentClient在处理长请求时未对agent提供的字符串进行规范化处理，直接传递给blobstore操作，可能导致路径遍历攻击。

CVSS 5.8 · Medium EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cloud Foundry Foundation BOSH Director < 282.1.12 affected
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I. Basic Information for CVE-2026-41009

Vulnerability Information
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Vulnerability Title
Local Blobstore may allow arbitrary reads/deletes
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Cloud Foundry BOSH Director 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cloud Foundry BOSH Director是美国Cloud Foundry公司的一个云基础设施部署与生命周期管理平台。 Cloud Foundry BOSH Director存在安全漏洞，该漏洞源于AgentClient在处理长请求时未对agent提供的字符串进行规范化处理，直接传递给blobstore操作，可能导致路径遍历攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cloud Foundry Foundation BOSH Director 0 ~ 282.1.12 -

II. Public POCs for CVE-2026-41009

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III. Intelligence Information for CVE-2026-41009

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Security Blog Posts for CVE-2026-41009 (1)

IV. Related Vulnerabilities

Same product: BOSH Director
Same vendor: Cloud Foundry Foundation
Same weakness: CWE-22