CVE-2026-34179

Name: CVE-2026-34179
Creator: NVD / NIST
Published: 2026-04-09T10:16:21.963+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2026-34179 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

0.27%

19.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-915

Affected Software

Vendor	Product	Versions
Canonical	Lxd	>= 4.12, <= 5.0.6
Canonical	Lxd	>= 5.21.0, <= 5.21.4
Canonical	Lxd	>= 6.0, <= 6.7

References

https://github.com/canonical/lxd/pull/17936Issue Tracking, Patch
https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5Exploit, Third Party Advisory
https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5Exploit, Third Party Advisory

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-34179?

How severe is CVE-2026-34179?

CVE-2026-34179 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2026-34179?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34179?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST