RPC secret disclosure via vendor data endpoint in Canonical MAAS

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-12392
StatePUBLISHED
Assignercanonical
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-02 20:17:01 UTC
Updated2026-10-02 20:17:01 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Canonical MAAS affected 3.4.0 3.4.10 semver Linux
CNA Canonical MAAS affected 3.5.0 3.5.14 semver Linux
CNA Canonical MAAS affected 3.6.0 3.6.5 semver Linux
CNA Canonical MAAS affected 3.7.0 3.7.3 semver Linux
CNA Canonical MAAS affected 3.8.0 semver Linux

References

ReferenceSourceLinkTags
github.com/canonical/maas/commit/65e89c05970f4514f9e6de043c2779017b43ad9d [email protected] github.com
github.com/canonical/maas/commit/a9486ad0cc90f4571142c1bea13f02d1361cb31e [email protected] github.com
github.com/canonical/maas/commit/8489979d64b0e7f124e7cef66d02b21263918f9b [email protected] github.com
bugs.launchpad.net/maas/+bug/2153942 [email protected] bugs.launchpad.net
github.com/canonical/maas/commit/3864ef9dca54e36e3d34d18233b87666b8ee1dc8 [email protected] github.com
github.com/canonical/maas/commit/ead659f70224538517c80478c3fd8c9e730aae79 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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