CVE-2026-34179: CWE-915 Improperly controlled modification of Dynamically-Determined object attributes in Canonical lxd
CVE-2026-34179 is a critical vulnerability in Canonical LXD versions 4. 12 through 6. 7 where the doCertificateUpdate function fails to validate the Type field in certificate update requests. This flaw allows a remote authenticated attacker with restricted TLS certificate user privileges to escalate their privileges to cluster admin. The vulnerability has a CVSS score of 9. 1, indicating a high severity with network attack vector, low attack complexity, and no user interaction required. No official patch or remediation guidance is currently provided by the vendor. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
The vulnerability exists in the doCertificateUpdate function within lxd/certificates.go of Canonical LXD versions 4.12 through 6.7. It improperly controls modification of dynamically-determined object attributes by not validating the Type field during PUT/PATCH requests to the /1.0/certificates/{fingerprint} endpoint for restricted TLS certificate users. This allows a remote authenticated attacker to escalate privileges to cluster administrator level, potentially gaining full control over the LXD cluster environment. The CVSS 3.1 base score is 9.1, reflecting critical impact on confidentiality, integrity, and availability.
Potential Impact
An attacker with restricted TLS certificate user access can exploit this vulnerability to escalate privileges to cluster admin, potentially leading to full control over the LXD cluster. This includes the ability to modify cluster-wide configurations and access sensitive data, severely impacting confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the /1.0/certificates/{fingerprint} endpoint to trusted users only and monitor for suspicious certificate update activities. Avoid granting unnecessary TLS certificate user privileges to reduce risk.
CVE-2026-34179: CWE-915 Improperly controlled modification of Dynamically-Determined object attributes in Canonical lxd
Description
CVE-2026-34179 is a critical vulnerability in Canonical LXD versions 4. 12 through 6. 7 where the doCertificateUpdate function fails to validate the Type field in certificate update requests. This flaw allows a remote authenticated attacker with restricted TLS certificate user privileges to escalate their privileges to cluster admin. The vulnerability has a CVSS score of 9. 1, indicating a high severity with network attack vector, low attack complexity, and no user interaction required. No official patch or remediation guidance is currently provided by the vendor. There are no known exploits in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the doCertificateUpdate function within lxd/certificates.go of Canonical LXD versions 4.12 through 6.7. It improperly controls modification of dynamically-determined object attributes by not validating the Type field during PUT/PATCH requests to the /1.0/certificates/{fingerprint} endpoint for restricted TLS certificate users. This allows a remote authenticated attacker to escalate privileges to cluster administrator level, potentially gaining full control over the LXD cluster environment. The CVSS 3.1 base score is 9.1, reflecting critical impact on confidentiality, integrity, and availability.
Potential Impact
An attacker with restricted TLS certificate user access can exploit this vulnerability to escalate privileges to cluster admin, potentially leading to full control over the LXD cluster. This includes the ability to modify cluster-wide configurations and access sensitive data, severely impacting confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the /1.0/certificates/{fingerprint} endpoint to trusted users only and monitor for suspicious certificate update activities. Avoid granting unnecessary TLS certificate user privileges to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- canonical
- Date Reserved
- 2026-03-26T09:24:08.449Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d773081cc7ad14da8bdc23
Added to database: 4/9/2026, 9:36:08 AM
Last enriched: 4/16/2026, 12:25:45 PM
Last updated: 5/24/2026, 11:17:09 AM
Views: 104
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