VulnerabilityDeferred

CVE-2026-1237

Vulnerable cross-model authorization in juju.

LOW 2.1EPSS 0.14%

Does this matter?

Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 4.0: 2.1 LOWCVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.14% probability · 4th percentile
CISA KEV: Not listed
Weakness: CWE-347, CWE-672
Source: security@ubuntu.com

References

https://github.com/juju/juju/security/advisories/GHSA-j477-6vpg-6c8x

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.