Auth bypass in Canonical Juju
CVE-2026-5412
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Canonical Juju — versions 2.9.0, 3.6.0
Weakness classification (CWE)
References
- github.com/juju/juju/security/advisories/GHSA-w5fq-8965-c969 (Exploit, vendor-advisory, Third Party Advisory, vdb-entry)
- github.com/juju/juju/pull/22206 (issue-tracking, Patch, patch, Issue Tracking)
- github.com/juju/juju/pull/22205 (issue-tracking, Patch, patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-5412?
- CVE-2026-5412 is a critical-severity vulnerability in Canonical Juju, classified under Improper Authorization. CVSS score: 9.9/10. Published 2026-04-10.
- How severe is CVE-2026-5412?
- Critical severity. CVSS v3 base score is 9.9 out of 10.