CVE-2026-39276: Path Traversal

Affected Software

Remediation

Recommended actions to resolve this vulnerability, in priority order.

1. Configuration

   Disable the template upload feature until a vendor patch or secure mitigation is available. If disabling is not possible, restrict who can upload templates to a minimal set of trusted administrators.

   Emlog Pro template upload feature template_upload_enabled = false
2. Configuration

   Ensure ZIP extraction rejects archive entries containing '../', absolute paths, or other directory-traversal sequences. Sanitize filenames before extraction and enforce extraction only into the intended template directory.

   Emlog Pro template upload handler zip_filename_sanitization = reject entries with directory traversal
3. Configuration

   Make template directories non-writable by the webserver process and writable only by privileged administrators to prevent uploaded archives from overwriting template files.

   Emlog Pro template directory filesystem_permissions = webserver_read_only
4. Compensating control

   Restrict access to the administration interface to trusted IPs/VPNs and enforce strong authentication for admin accounts (e.g., MFA) to reduce the risk of an attacker with valid credentials exploiting the upload feature.

5. Operational

   Audit current template files and site code for unauthorized modifications or malicious PHP files. Remove any uploaded archives and malicious files, and restore templates from known-good backups where necessary. Scan the webserver for web shells or other indicators of compromise.

6. Operational

   If compromise is suspected, rotate administrative credentials and any potentially exposed secrets after remediation steps are applied.

Event History

Frequently Asked Questions