CVE-2026-10720: CWE-23 Relative path traversal in Canonical Microceph
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.
AI Analysis
Technical Summary
CVE-2026-10720 is a CWE-23 relative path traversal vulnerability affecting Canonical MicroCeph versions 19.2.1+snap74c0060321 and 20.0.0. The issue exists in the remote-import API, where an attacker possessing a trusted cluster mTLS certificate or join token can manipulate files in an imported remote cluster within the confined directory /var/snap/microceph. This manipulation can disrupt daemon operations and corrupt cluster state data. The vulnerability requires high privileges (trusted certificate or token) and does not involve user interaction. No vendor advisory or patch is currently available to address this issue.
Potential Impact
An attacker with a trusted cluster mTLS certificate or join token can exploit the path traversal vulnerability to manipulate files within the MicroCeph confinement directory. This can cause daemon disruption and cluster state pollution, potentially affecting cluster stability and reliability. The impact is limited to authorized cluster members or entities with join tokens, reducing the attack surface to privileged users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to trusted cluster mTLS certificates and join tokens to minimize risk. Monitor for any updates from Canonical regarding patches or mitigations for this vulnerability.
CVE-2026-10720: CWE-23 Relative path traversal in Canonical Microceph
Description
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.
CVSS v4.0
Score 5.1medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-10720 is a CWE-23 relative path traversal vulnerability affecting Canonical MicroCeph versions 19.2.1+snap74c0060321 and 20.0.0. The issue exists in the remote-import API, where an attacker possessing a trusted cluster mTLS certificate or join token can manipulate files in an imported remote cluster within the confined directory /var/snap/microceph. This manipulation can disrupt daemon operations and corrupt cluster state data. The vulnerability requires high privileges (trusted certificate or token) and does not involve user interaction. No vendor advisory or patch is currently available to address this issue.
Potential Impact
An attacker with a trusted cluster mTLS certificate or join token can exploit the path traversal vulnerability to manipulate files within the MicroCeph confinement directory. This can cause daemon disruption and cluster state pollution, potentially affecting cluster stability and reliability. The impact is limited to authorized cluster members or entities with join tokens, reducing the attack surface to privileged users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to trusted cluster mTLS certificates and join tokens to minimize risk. Monitor for any updates from Canonical regarding patches or mitigations for this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- canonical
- Date Reserved
- 2026-06-02T22:29:08.534Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a34df95f198dc38c19de53e
Added to database: 6/19/2026, 6:20:05 AM
Last enriched: 6/19/2026, 6:36:48 AM
Last updated: 6/19/2026, 11:32:59 PM
Views: 10
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