Vulnerability · Published Jan 28, 2026 · Assigned by canonical
CVE-2026-1237
Low 2.1
In plain English
A low-severity security flaw in juju from Canonical. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).
Official description
Vulnerable cross-model authorization in juju. If a charm's cross-model permissions are revoked or expire, a malicious user who is able to update database records can mint an invalid macaroon that is incorrectly validated by the juju controller, enabling a charm to maintain otherwise revoked or expired permissions. This allows a charm to continue relating to another charm in a cross-model relation, and use their workload without their permission. No fix is available as of the time of writing.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/juju/juju | no fix listed | GO-2026-4388 |
| Go | github.com/juju/juju | no fix listed | GHSA-j477-6vpg-6c8x |
Affected products (as reported)
Weakness: CWE-672, CWE-347 · Vector: CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L