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Vulnerabilities

Vulnerability · CVE-2026-112816

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 authe

Published Oct 30, 2026 · catalog updated Oct 31, 2026 · Canonical

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-112816. EPSS is 0.30%. Act only if a listed version of Canonical is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical10.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.30%
Remediation
Advisory link
Affected products
vendor Canonical

Canonical heeft een kwetsbaarheid verholpen in LXD. De kwetsbaarheid (CVE-2026-112816) wordt veroorzaakt door onjuiste validatie van certificaatketens binnen de HTTPS API van Canonical LXD. De kwetsbaarheid treft LXD-versies vóór 4.0.15, 5.0.11, 5.21.9 en 6.10.1 binnen de betreffende releasebranches. Hierdoor kunnen niet-geauthenticeerde aanvallers die netwerktoegang hebben tot de HTTPS API en beschikken over het publieke certificaat van een vertrouwde client, zich voordoen als die client. Dit is mogelijk doordat LXD ten onrechte alle certificaten in de aangeboden certificaatketen controleert

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Canonicalversion unspecified

How to fix CVE-2026-112816

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-112816. EPSS is 0.30%. Act only if a listed version of Canonical is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.30%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ubuntu security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 30, 2026 · EUVD

    Detected

    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.

  2. Oct 31, 2026 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-112816

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-112816

    30-day exploitation probability 0.30%

    first.org
  • EUVDVulnerability recordEUVD-2026-114194

    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

    euvd.enisa.europa.eu
  • NCSC NetherlandsGovernment advisoryCVE-2026-112816

    Canonical heeft een kwetsbaarheid verholpen in LXD. De kwetsbaarheid (CVE-2026-112816) wordt veroorzaakt door onjuiste validatie van certificaatketens binnen de HTTPS API van Canonical LXD. De kwetsbaarheid treft LXD-versies vóór 4.0.15, 5.0.11, 5.21.9 en 6.10.1 binnen de betreff

    advisories.ncsc.nl

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • NCSC NetherlandsNov 6, 2026
  • CVE.orgOct 31, 2026
  • EUVDOct 31, 2026