CVE-2026-5412: Juju CloudSpec API could leak senstive information

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-10 · updated 2026-10-26
Weakness: CWE-285

Description

In Juju versions prior to 2.9.57 and 3.6.21, an authorization issue exists in the Controller facade. An authenticated user can call the CloudSpec API method to extract the cloud credentials used to bootstrap the controller. This allows a low-privileged user to access sensitive credentials. This issue is resolved in Juju versions 2.9.57 and 3.6.21.

Affected products

Canonical Juju: before 2.9.57; from 3.6 before 3.6.21 — fixed in 2.9.57, 3.6.21

How to fix

Upgrade to a fixed version: Canonical Juju 2.9.57, 3.6.21. Check the vendor advisory for mitigations.

References

https://github.com/juju/juju/pull/22205
https://github.com/juju/juju/pull/22206
https://github.com/juju/juju/security/advisories/GHSA-w5fq-8965-c969

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