Canonical LXD up to 5.0.6/5.21.4/6.7.x TLS Certificate lxd/certificates.go doCertificateUpdate Type dynamically-determined object attributes

Summaryinfo

A vulnerability, which was classified as critical, has been found in Canonical LXD up to 5.0.6/5.21.4/6.7.x. Affected by this issue is the function doCertificateUpdate of the file lxd/certificates.go of the component TLS Certificate Handler. Performing a manipulation of the argument Type results in dynamically-determined object attributes. This vulnerability is identified as CVE-2026-34179. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Canonical LXD up to 5.0.6/5.21.4/6.7.x. This affects the function doCertificateUpdate of the file lxd/certificates.go of the component TLS Certificate Handler. The manipulation of the argument Type with an unknown input leads to a dynamically-determined object attributes vulnerability. CWE is classifying the issue as CWE-915. The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.

The weakness was released by Miha Purg. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-34179 since 03/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation needs additional levels of successful authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.0.7, 5.21.5 or 6.8.0 eliminates this vulnerability.

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Productinfo

Vendor

• Canonical

Name

• LXD

Version

• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.21.0
• 5.21.1
• 5.21.2
• 5.21.3
• 5.21.4
• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.6
• 6.7

License

• open-source

Website

• Product: https://github.com/canonical/lxd/

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