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Path Traversal in MoviePilot AliPan, U115, and Rclone Download Handlers

IdentifiersCVE-2026-11416CWE-22· Improper Limitation of a Pathname…

CVE-2026-11416 is a path traversal vulnerability in MoviePilot affecting the AliPan, U115, and Rclone cloud storage download handlers. The flaw arises because MoviePilot constructs the local destination path by concatenating the configured download directory with a filename obtained directly from remote cloud API metadata, without basename normalization or path validation. If an attacker can control the filename returned by the remote cloud storage API, they can include traversal sequences such as ../ to escape the intended download directory and cause downloaded content to be written to attacker-chosen filesystem locations reachable by the MoviePilot process. This can result in arbitrary file overwrite conditions, including overwriting configuration files or plugin files accessible to the application.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker to write files outside the configured download directory by abusing traversal sequences in remote filenames. The primary impact is arbitrary file overwrite within the filesystem permissions of the MoviePilot process. This can compromise integrity by modifying configuration or plugin files and can also affect availability if critical application files are overwritten. The provided scoring indicates high integrity and availability impact, with no specific confidentiality impact established from the available information.

Mitigation

If you can’t patch tonight, do this now.

Until a fixed version is deployed, restrict or disable the affected AliPan, U115, and Rclone download handlers when interacting with untrusted or attacker-influenced remote sources. Sanitize and validate remote filenames to remove traversal elements such as ../ before use. Run MoviePilot with the least filesystem privileges possible and isolate writable directories so that arbitrary overwrite opportunities are minimized.

Remediation

Patch, then assume compromise.

Apply the vendor fix referenced in the upstream MoviePilot repository/commit. The vulnerable download handlers should normalize filenames using basename-style handling and perform strict path validation before constructing destination paths. File writes should be constrained so the resolved final path remains within the configured download directory. Updating to a version containing the fix is the recommended remediation.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

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