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.
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.27% probability · 20th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Source
- security@ubuntu.com
EPSS moved from 0.3% on 3 October 2026 to 0.3% on 26 October 2026.
References
- https://bugs.launchpad.net/maas/+bug/2153942
- https://github.com/canonical/maas/commit/3864ef9dca54e36e3d34d18233b87666b8ee1dc8
- https://github.com/canonical/maas/commit/65e89c05970f4514f9e6de043c2779017b43ad9d
- https://github.com/canonical/maas/commit/8489979d64b0e7f124e7cef66d02b21263918f9b
- https://github.com/canonical/maas/commit/a9486ad0cc90f4571142c1bea13f02d1361cb31e
- https://github.com/canonical/maas/commit/ead659f70224538517c80478c3fd8c9e730aae79
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.