Is CVE-2026-12392 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-12392?

CVE-2026-12392 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-12392

Description

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.