2.1

CVE-2026-1237: canonical juju

CVSS: 2.1v4.0LowDeferred
AliasesGHSA-j477-6vpg-6c8xGO-2026-4388
Published 28-01-2026Last modified 28-01-2026
Open JSON

Vulnerability summary

CVE-2026-1237 is a low (CVSS 2.1) vulnerability in canonical juju. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.3% of scored vulnerabilities.

Overall risk
8/100
0100
Minimal · default modelHow is this calculated?
CVSS score
2.1/10
010
Low · v4.0 (CVE.org)
EPSS score
0.14%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:0403-1

Timeline

  1. 28-01-2026
    PublishedVulnerability first disclosed.
  2. 28-01-2026
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

+0.01 pp

From 0.13% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Canonical1 product
  • jujuAll versions (No fix recorded)
Github.com/juju1 product
  • juju≤ 0.0.0-20260127110037-9b1a0e53a4a4 | All versions (No fix recorded)

2 vendors · 2 products

References

4 links