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 during 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 high CVSS score of 9. 1, indicating severe impact on confidentiality, integrity, and availability. No official patch or remediation guidance is currently available from the vendor. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not properly validate the Type field when processing PUT or PATCH requests to the /1.0/certificates/{fingerprint} endpoint for restricted TLS certificate users. This improper validation (CWE-915) enables a remote authenticated attacker to escalate privileges to cluster admin, potentially gaining full control over the cluster. The vulnerability is rated critical with a CVSS 3.1 score of 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
Potential Impact
An attacker with existing restricted TLS certificate user access can exploit this vulnerability to escalate privileges to cluster admin, compromising confidentiality, integrity, and availability of the LXD cluster. This could lead to full administrative control over the cluster environment.
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 certificate update API endpoint to trusted users only and monitor for suspicious activity related to certificate modifications.
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 during 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 high CVSS score of 9. 1, indicating severe impact on confidentiality, integrity, and availability. No official patch or remediation guidance is currently available from the vendor. There are no known exploits in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not properly validate the Type field when processing PUT or PATCH requests to the /1.0/certificates/{fingerprint} endpoint for restricted TLS certificate users. This improper validation (CWE-915) enables a remote authenticated attacker to escalate privileges to cluster admin, potentially gaining full control over the cluster. The vulnerability is rated critical with a CVSS 3.1 score of 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
Potential Impact
An attacker with existing restricted TLS certificate user access can exploit this vulnerability to escalate privileges to cluster admin, compromising confidentiality, integrity, and availability of the LXD cluster. This could lead to full administrative control over the cluster environment.
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 certificate update API endpoint to trusted users only and monitor for suspicious activity related to certificate modifications.
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: 4/9/2026, 9:50:51 AM
Last updated: 4/9/2026, 10:56:44 AM
Views: 13
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