CVE-2026-10720: Canonical MicroCeph Path Traversal Vulnerability

MODERATE
Advisory Identifier: GHSA-xg3j-c7q4-f9ph
Share
CWE-23
Published
Advisory Summary

CVE-2026-10720 is a MODERATE path traversal vulnerability (CWE-23: Relative Path Traversal) affecting Canonical MicroCeph libraries in the Go ecosystem. The issue involves path traversal issue in the remote-import ap. Remediation is available by upgrading affected packages to version 0.0.0-20260609072127-5c2760d8fb76.

CVE-2026-10720 at a Glance

CVE Identifier CVE-2026-10720
GHSA Identifier GHSA-xg3j-c7q4-f9ph
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-23: Relative Path Traversal
Affected Product Canonical MicroCeph
Package Ecosystem Go
Published Date
Last Updated

How to Fix CVE-2026-10720

To remediate this vulnerability, upgrade all affected Canonical MicroCeph dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/canonical/microceph/microceph fixed: 0.0.0-20260609072127-5c2760d8fb76 
Upgrade github.com/canonical/microceph/microceph to 0.0.0-20260609072127-5c2760d8fb76
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/canonical/microceph/microceph

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-10720, inspect your project dependencies for Canonical MicroCeph:

inspect dependencies for github.com/canonical/microceph/microceph

Analyze the terminal output to locate any version of Canonical MicroCeph in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.0-20260609072127-5c2760d8fb76), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-23: Relative Path Traversal, where the product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. In Canonical MicroCeph, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Canonical MicroCeph versions from the squid and tentacle track are vulnerable to a path traversal issue in the remote-import API. Holders of a trusted cluster mTLS certificate (such as enrolled cluster members) or join token can manipulate files in an imported remote cluster within the /var/snap/microceph confinement. This would allow daemon disruption and pollution of the cluster state.

CVE-2026-10720 Affected Canonical MicroCeph Versions

1 component(s)
Fixed Versions:
0.0.0-20260609072127-5c2760d8fb76
Product / Package Ecosystem Affected Versions Fixed Version
github.com/canonical/microceph/microceph
golang/github.com/canonical/microceph/microceph
Go
< 0.0.0-20260609072127-5c2760d8fb76
0.0.0-20260609072127-5c2760d8fb76

References

NVD — CVE-2026-10720 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-10720
Canonical MicroCeph Source Repository REPOSITORY
https://github.com/canonical/microceph/pull/758
Security Fix Commit FIX COMMIT
https://github.com/canonical/microceph/commit/5c2760d8fb765d670e2673d3a537b67eae4b67c6
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-xg3j-c7q4-f9ph
Canonical MicroCeph Source Repository REPOSITORY
https://github.com/canonical/microceph

Frequently Asked Questions

What is CVE-2026-10720?
CVE-2026-10720 is a security vulnerability in Canonical MicroCeph involving path traversal issue in the remote-import AP under CWE-23: Relative Path Traversal.
Which Canonical MicroCeph versions are affected?
Affected versions include releases prior to 0.0.0-20260609072127-5c2760d8fb76 across affected packages: github.com/canonical/microceph/microceph.
What version fixes CVE-2026-10720?
Upgrading to 0.0.0-20260609072127-5c2760d8fb76 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/canonical/microceph/microceph affected?
Yes, github.com/canonical/microceph/microceph is affected in releases prior to 0.0.0-20260609072127-5c2760d8fb76. Upgrade your dependency to 0.0.0-20260609072127-5c2760d8fb76 or later.
What CWE is associated with CVE-2026-10720?
CVE-2026-10720 is classified under CWE-23: Relative Path Traversal (The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.).
How can I check Go dependencies for CVE-2026-10720?
Run the dependency tree command: 'inspect dependencies for github.com/canonical/microceph/microceph'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xg3j-c7q4-f9ph",
  "modified" : "2026-07-21T15:01:28Z",
  "published" : "2026-06-19T06:31:55Z",
  "aliases" : [ "CVE-2026-10720" ],
  "summary" : "Canonical MicroCeph: path traversal issue in the remote-import AP",
  "details" : "Canonical MicroCeph versions from the squid and tentacle track are vulnerable to a path traversal issue in the remote-import API. Holders of a trusted cluster mTLS certificate (such as enrolled cluster members) or join token can manipulate files in an imported remote cluster within the /var/snap/microceph confinement. This would allow daemon disruption and pollution of the cluster state.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/canonical/microceph/microceph"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.0-20260609072127-5c2760d8fb76"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-10720"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/canonical/microceph/pull/758"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/canonical/microceph/commit/5c2760d8fb765d670e2673d3a537b67eae4b67c6"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-xg3j-c7q4-f9ph"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/canonical/microceph"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-23" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-19T22:10:23Z",
    "nvd_published_at" : "2026-06-19T06:17:00Z"
  }
}