CVE-2026-1237

State: Published
Severity: 2.1 Low
Published: Jan 28, 2026
Updated: Jan 28, 2026
Reserved: Jan 20, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	2.1 Low	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	canonical

Weaknesses

CWE-672 Operation on a Resource after Expiration or Release
CWE-347 Improper Verification of Cryptographic Signature

Affected Products

Product	Versions
jujuCanonical	0Affected

References

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

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