CVE-2026-12392
RPC secret disclosure via vendor data endpoint in Canonical MAAS
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | canonical |
| Product | maas |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 2, 2026 |
Stay Ahead of the Next One
Get instant alerts for canonical maas
Be the first to know when new medium vulnerabilities affecting canonical maas are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Canonical / MAAS
3.4.0 < 3.4.10 3.5.0 < 3.5.14 3.6.0 < 3.6.5 3.7.0 < 3.7.3 0 < 3.8.0
References
github.com: https://github.com/canonical/maas/commit/8489979d64b0e7f124e7cef66d02b21263918f9b github.com: https://github.com/canonical/maas/commit/a9486ad0cc90f4571142c1bea13f02d1361cb31e github.com: https://github.com/canonical/maas/commit/ead659f70224538517c80478c3fd8c9e730aae79 github.com: https://github.com/canonical/maas/commit/3864ef9dca54e36e3d34d18233b87666b8ee1dc8 github.com: https://github.com/canonical/maas/commit/65e89c05970f4514f9e6de043c2779017b43ad9d bugs.launchpad.net: https://bugs.launchpad.net/maas/+bug/2153942