4.3

CVE-2026-3351: canonical lxd Missing Authorization

CVSS: 4.3v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-3351GHSA-crmg-9m86-636rGO-2026-4595
Published 03-03-2026Last modified 05-03-2026
Open JSON

Vulnerability summary

CVE-2026-3351 is a medium (CVSS 4.3) Missing Authorization vulnerability in canonical lxd. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.22%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:1042-1

Timeline

  1. 03-03-2026
    PublishedVulnerability first disclosed.
  2. 05-03-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

+0.08 pp

From 0.14% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Lxd

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Canonical1 product
Github.com/canonical1 product
  • lxd< 0.0.0-20260224152359-d936c90d47cf | All versions (No fix recorded)
Ubuntu1 product
  • lxdAll versions (No fix recorded)

3 vendors · 3 products

References

7 links