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CVE-2026-5412

Canonical Juju broken access control

9.9 CRITICALPublic exploitEPSS 0.48%
  1. Published10 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Canonical Juju≥ 3.6 < 3.6.21 · < 2.9.57

Remediation

Fixed in
Canonical Juju≥ 3.6.21

References

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Frequently asked

Is CVE-2026-5412 being actively exploited?

CVE-2026-5412 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.48%.

How severe is CVE-2026-5412?

CVE-2026-5412 has a CVSS 3.1 base score of 9.9, rated critical. EPSS estimates a 0.48% probability of exploitation.

Which products are affected by CVE-2026-5412?

Affected products include Canonical Juju.

How do I fix CVE-2026-5412?

Upgrade affected software to a fixed version, for example Canonical Juju 3.6.21 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.