CVE-2026-41704 Compromised VM can make arbitrary blobstore deletes
A compromised VM can delete arbitrary blobs from the shared BOSH Director blobstore due to missing ownership checks in resource deletion logic.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41704?
CVE-2026-41704 is a medium-severity missing authorization vulnerability in Cloud Foundry Foundation BOSH Director, published on 27 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
AgentClient#handle_method (lines 264-303) processes every NATS reply. It calls inject_compile_log (line 273) on every response, which reads response['value']['result']['compile_log_id'] (line 332-338) and passes it to download_and_delete_blob. Separately, any response containing 'exception' goes through format_exception (lines 308-325), which reads exception['blobstore_id'] and also calls download_and_delete_blob. That helper (lines 344-349) calls ResourceManager#get_resource(blob_id) and, in an ensure block, ResourceManager#delete_resource(blob_id). ResourceManager (resource_manager.rb:62-70) calls blobstore.delete(id) on the single shared Director blobstore with no UUID-format check, no ownership check, and no namespace prefix.
Affected versions: BOSH Director: All versions prior to v282.1.12
Weakness: CWE-284
Which versions are affected by CVE-2026-41704?
It affects 1 product.
Products include Cloud Foundry Bosh.
How do I fix CVE-2026-41704?
No fix has been published for CVE-2026-41704 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-41704 being exploited?
There is no known exploitation of CVE-2026-41704 in the wild and no public exploit code.
Other vulnerabilities in Cloud Foundry Foundation BOSH Director
Sources
Also known as GHSA-mhvf-vxjh-cwwp.