How severe is CVE-2026-34179?

CVE-2026-34179 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-34179 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34179?

CVE-2026-34179 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34179?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-34179 have an EU (EUVD) identifier?

Yes. CVE-2026-34179 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20876.

When was CVE-2026-34179 published?

CVE-2026-34179 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-34179

CVE-2026-34179 is a critical-severity vulnerability in Canonical Lxd with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-915.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20876
Weakness: CWE-915
Affected product: Canonical Lxd
Published: 2026-04-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-34179?: 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.
How severe is CVE-2026-34179?: CVE-2026-34179 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-34179 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34179?: CVE-2026-34179 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34179?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-34179 have an EU (EUVD) identifier?: Yes. CVE-2026-34179 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20876.
When was CVE-2026-34179 published?: CVE-2026-34179 was published on 2026-04-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*

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