CVE-2026-48070: Docmost: Avatar URL path traversal in avatar cleanup leads to arbitrary local file deletion
Docmost is open-source collaborative wiki and documentation software. Prior to 0.80.1, authenticated users can store attacker-controlled avatarUrl values that are later reused by avatar cleanup without confinement to the intended directory on local-storage deployments. A low-privileged user can cause deletion of arbitrary local files or directories reachable by the Docmost service account. This issue is fixed in version 0.80.1.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Docmostto a version that resolves this vulnerability.Fixed in 0.80.1
Event History
Frequently Asked Questions
Which deployments are affected?
The issue affects Docmost versions before 0.80.1 when avatars use local storage. The vulnerable cleanup process runs with the permissions of the Docmost service account.
What access does an attacker need?
An attacker needs an authenticated Docmost account, including a low-privileged account. They can set an attacker-controlled avatarUrl that is later processed by avatar cleanup.
What is the practical impact?
A low-privileged authenticated user may delete arbitrary local files or directories that are reachable by the Docmost service account. The issue affects integrity and availability; no confidentiality impact is stated.
How can the issue be remediated?
Upgrade Docmost to version 0.80.1, which fixes the vulnerability.