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CriticalCloud and identityNov 1, 2026

Critical Flaw in Canonical LXD and MicroCloud Exposes Virtual Servers

A maximum-severity security flaw has been uncovered in Canonical LXD and MicroCloud software. Attackers with network access can impersonate trusted accounts using only a public certificate, completely bypassing the need for a private key. Once authenticated, intruders can gain full control over virtual machines and cloud clusters, putting business data at serious risk.

Cloud and identity security briefing

Who is affected

Organisations hosting virtual machines or container clusters using Canonical LXD or MicroCloud with accessible HTTPS APIs.

How to mitigate it

  1. 1Apply the latest vendor security patches from Canonical for LXD and MicroCloud immediately.
  2. 2Restrict access to HTTPS management APIs so they cannot be reached from untrusted networks or the public internet.
  3. 3Audit server and cluster access logs for suspicious authentication events and unexpected client connections.
  4. 4Place infrastructure management interfaces behind a secure virtual private network with strict access controls.

How Outsource IT solves this

Managed Cloud & Infrastructure Services ensures private cloud environments and virtual machines are properly configured, segregated, and promptly patched against severe security exploits.

Managed Cloud & Infrastructure Services

Tags

Cloud SecurityVulnerabilityVirtualisationLXD

Source advisory: the-hacker-news

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