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… (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. This occurs if a target machine was deployed with the 'register as rack' option enabled and the attacker can obtain or infer the machine's system ID. The vulnerability has a CVSS score of 5.3, indicating medium severity.
AI Analysis
Technical Summary
CVE-2026-12392 describes an information exposure vulnerability in Canonical MAAS affecting versions prior to 3.4.10, 3.5.14, 3.6.5, 3.7.3, and 3.8.0. An unauthenticated attacker can retrieve the RPC secret in plaintext by querying the vendor data metadata endpoint if the target machine was deployed with the 'register as rack' option enabled and the attacker knows or infers the machine's system ID. This secret exposure could potentially lead to unauthorized access or further attacks relying on the leaked secret.
Potential Impact
The vulnerability allows an unauthenticated attacker to obtain the RPC secret in plaintext, which could compromise the confidentiality of sensitive information used by the MAAS system. However, the impact is limited to information disclosure without direct integrity or availability impact. The CVSS score of 5.3 reflects a medium severity level.
Mitigation Recommendations
A fix is available in Canonical MAAS versions 3.4.10, 3.5.14, 3.6.5, 3.7.3, and 3.8.0. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation guidance is provided in the available data.
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… (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. This occurs if a target machine was deployed with the 'register as rack' option enabled and the attacker can obtain or infer the machine's system ID. The vulnerability has a CVSS score of 5.3, indicating medium severity.
CVSS v3.1
Score 5.3medium
Affected software
pkg:github/canonical/maasRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12392 describes an information exposure vulnerability in Canonical MAAS affecting versions prior to 3.4.10, 3.5.14, 3.6.5, 3.7.3, and 3.8.0. An unauthenticated attacker can retrieve the RPC secret in plaintext by querying the vendor data metadata endpoint if the target machine was deployed with the 'register as rack' option enabled and the attacker knows or infers the machine's system ID. This secret exposure could potentially lead to unauthorized access or further attacks relying on the leaked secret.
Potential Impact
The vulnerability allows an unauthenticated attacker to obtain the RPC secret in plaintext, which could compromise the confidentiality of sensitive information used by the MAAS system. However, the impact is limited to information disclosure without direct integrity or availability impact. The CVSS score of 5.3 reflects a medium severity level.
Mitigation Recommendations
A fix is available in Canonical MAAS versions 3.4.10, 3.5.14, 3.6.5, 3.7.3, and 3.8.0. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation guidance is provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-3r9p-96x8-39gw
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-12392"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac139baa43b0b3b89d69d44
Added to database: 10/03/2026, 17:22:02 UTC
Last enriched: 10/03/2026, 17:42:48 UTC
Last updated: 10/04/2026, 04:45:56 UTC
Views: 9
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