Canonical Maas up to 3.7.x Vendor Data Metadata Endpoint missing encryption

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Canonical Maas up to 3.4.9/3.5.13/3.6.4/3.7.2/3.7.x. The impacted element is an unknown function of the component Vendor Data Metadata Endpoint. Performing a manipulation results in missing encryption. This vulnerability is identified as CVE-2026-12392. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Canonical Maas up to 3.4.9/3.5.13/3.6.4/3.7.2/3.7.x. This affects an unknown functionality of the component Vendor Data Metadata Endpoint. The manipulation with an unknown input leads to a missing encryption vulnerability. CWE is classifying the issue as CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-12392 since 06/16/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

Upgrading to version 3.4.10, 3.5.14, 3.6.5, 3.7.3 or 3.8.0 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Canonical

Name

• Maas

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.4.5
• 3.4.6
• 3.4.7
• 3.4.8
• 3.4.9
• 3.5
• 3.5.0
• 3.5.1
• 3.5.2
• 3.5.3
• 3.5.4
• 3.5.5
• 3.5.6
• 3.5.7
• 3.5.8
• 3.5.9
• 3.5.10
• 3.5.11
• 3.5.12
• 3.5.13
• 3.6
• 3.6.0
• 3.6.1
• 3.6.2
• 3.6.3
• 3.6.4
• 3.7
• 3.7.0
• 3.7.1
• 3.7.2

License

• open-source

Website

• Product: https://github.com/canonical/maas/

CPE 2.3info

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CPE 2.2info

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