CVE-2026-3351: Authorization Bypass in LXD GET /1.0/certificates Endpoint

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-03 · updated 2026-06-17
Weakness: CWE-862

Description

Improper authorization in the API endpoint GET /1.0/certificates in Canonical LXD 6.6 on Linux allows an authenticated, restricted user to enumerate all certificate fingerprints trusted by the lxd server.

Affected products

Canonical LXD: 6.6

References

https://github.com/canonical/lxd/commit/d936c90d47cf0be1e9757df897f769e9887ebde1
https://github.com/canonical/lxd/pull/17738
https://github.com/canonical/lxd/security/advisories/GHSA-crmg-9m86-636r

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