Missing Authorization Affecting lxd package, versions <3.0.3-0ubuntu1~18.04.2+esm3


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.41% (34th percentile)

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  • Snyk IDSNYK-UBUNTU1804-LXD-16800559
  • published17 Jun 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39833  (opens in a new tab)
CWE-862  (opens in a new tab)

How to fix?

Upgrade Ubuntu:18.04 lxd to version 3.0.3-0ubuntu1~18.04.2+esm3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream lxd package and not the lxd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.

CVSS Base Scores

version 3.1