Juju: CloudSpec method leaking cloud credentials
Exact source revision recorded 24 Oct 2026 13:19:41 UTC. It does not establish the source's current position. Latest evidence.
osv · GHSA-w5fq-8965-c969
Published### Impact If a user has login permission to a controller and knows the controller model UUID, they can call the CloudSpec method on the Controller facade and get cloud credentials used to bootstrap the controller. The CloudSpec API is called by workers running in the controller to maintain connection to the cloud - this aspect is not the issue. The API is also called by the CLI when killing (force destroying a controller with `juju kill-controller`). This is the problematic aspect. The API is exposed to any client caller where that client has nothing more than logon permission on the controller. What should happen is that getting access to the credential should be limited to those client connections where the authenticated user has superuser or model admin permission. This affect 2.9, 3.6, 4.0.6 (snap from 4.0/edge channel). The fix will allow non-confidential, public information like cloud endpoint etc to be read, but only controller superusers or model admins will be able to see the credential details. ### Patches No patch exists. ### Workarounds The only mitigation is to restrict ingress to the controller API port 17070 on all controller machines (for vm deployments) or the controller service (for k8s deployments). The Juju CLI and other clients like libjuju or JAAS require ingress to port 17070 so any restricted access will need to take into account those access requirements.
- Source published
- 10 Apr 2026 21:00:16 UTC
- Source modified
- 25 Jun 2026 23:11:47 UTC
- Observed here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- GitHub Advisory Database · CC-BY-4.0
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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.
CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Publisher rating · CRITICAL