Vulnerability in Canonical Maas
CVE-2026-12392
An information exposure vulnerability in Canonical MAAS prior to versions 3.4.10, 3.5.14, 3.6.5, 3.7.3, and 3.8.0 allows an unauthenticated attacker to retrieve the RPC secret in plaintext via the vendor data metadata endpoint. If a target machine was deployed with the 'register as rack' option enabled, an attacker who obtains or infers the machine's system ID can query the preseed/metadata server to leak the secret.
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
References
- github.com/canonical/maas/commit/8489979d64b0e7f124e7cef66d02b21263918f9b (patch)
- github.com/canonical/maas/commit/a9486ad0cc90f4571142c1bea13f02d1361cb31e (patch)
- github.com/canonical/maas/commit/ead659f70224538517c80478c3fd8c9e730aae79 (patch)
- github.com/canonical/maas/commit/3864ef9dca54e36e3d34d18233b87666b8ee1dc8 (patch)
- github.com/canonical/maas/commit/65e89c05970f4514f9e6de043c2779017b43ad9d (patch)
- bugs.launchpad.net/maas/+bug/2153942 (issue-tracking, vendor-advisory)
Frequently asked questions
- What is CVE-2026-12392?
- CVE-2026-12392 is a medium-severity vulnerability in Canonical Maas. CVSS score: 5.3/10. Published 2026-10-02.
- How severe is CVE-2026-12392?
- Medium severity. CVSS v3 base score is 5.3 out of 10.