CVE-2026-112816: Canonical LXD (Critical, CVSS 10)
- CVSS
- 10 Critical (v4.0)
- EPSS
- 0.3% chance of exploitation in the next 30 days (higher than 23.1% of CVEs)
- Exploited in the wild
- Not on CISA’s KEV list
- Public exploit
- Yes, reported in 1 GitHub repository
- Weakness
- CWE-295
- Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H- Published
- Oct 30, 2026
What it is
Improper certificate validation in the HTTPS listener in Canonical LXD 4.0.14, 5.0.10, 5.21.8, 6.9 before 4.0.15, 5.0.11, 5.21.9, 6.10.1 allows an unauthenticated attacker to authenticate as any trusted client and gain full access to the cluster and managed virtual machines via a crafted certificate chain.
Description from the National Vulnerability Database.
What to do
Check whether you run Canonical LXD, then apply the vendor’s fix or mitigation from the advisories below. Because this flaw is exploited or has public exploit code, treat it as urgent and check for signs of compromise, not just the patch level.
ThreatRoundup coverage
CVE Watch: PHP2Shell Roots Firewalls as CISA Adds 12 Exploited Bugs
Max-Severity LXD Bug Lets Attackers Pose as Your Trusted Admin
Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.