All vulnerabilities
CVE-2026-12392

RPC secret disclosure via vendor data endpoint in Canonical MAAS

Canonical MAAS
Open in ThreatlineRecord JSON
CVSS
5.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.27%Chance of exploitation activity in the next 30 days, higher than 18% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.4.10Also 3.5.14, 3.6.5 and 2 moreCVE List
Published2 Oct 2026Updated 4 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 5

  • MAASaffected: 3.4.0 before 3.4.10CVE List
  • MAASaffected: 3.5.0 before 3.5.14CVE List
  • MAASaffected: 3.6.0 before 3.6.5CVE List
  • MAASaffected: 3.7.0 before 3.7.3CVE List
  • MAASaffected: all versions before 3.8.0CVE List

References 6