CVE-2026-88016
Description
A flaw was found in rclone. When the backend/local component operates with the --links option, a specially crafted .rclonelink object from the source can create a symbolic link (symlink) in the destination. Subsequently, directory metadata operations, such as changing ownership, permissions, or modification times, are applied through this planted symlink. This allows an attacker controlling the source contents to modify the ownership, permissions, or timestamps of files or directories outside the intended destination, potentially leading to unauthorized data modification or privilege escalation.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
To mitigate this issue, avoid using the `--links` flag with rclone when synchronizing content from untrusted sources. If the `--links` flag is necessary, ensure that all source content is trusted to prevent the planting of malicious symlinks.
Understanding the Weakness (CWE)
Confidentiality,Integrity,Access Control
Technical Impact: Read Files or Directories; Modify Files or Directories; Bypass Protection Mechanism
An attacker may be able to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. If the files are used for a security mechanism then an attacker may be able to bypass the mechanism.
Other
Technical Impact: Execute Unauthorized Code or Commands
Windows simple shortcuts, sometimes referred to as soft links, can be exploited remotely since a ".LNK" file can be uploaded like a normal file. This can enable remote execution.
Frequently Asked Questions
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