What happened
The Convert and Merge AI agent tools resolve relative file paths against the process current working directory instead of locking them to the configured output directory, enabling path traversal for arbitrary file read and, where writable, overwrite (CVSS 7.1, CWE-22).
Why it matters
AI agent tools that manipulate files on behalf of a low-privilege user become a channel to read and overwrite files outside the intended sandbox, risking disclosure of documents/configuration and tampering with files the agent later consumes.
Attack vector
An authenticated low-privilege caller supplies tool arguments with relative paths that resolve against the process working directory, allowing reads outside the configured output directory and overwrites of writable files.
Affected systems
Progress Telerik Document Processing Libraries >= 2026.1.210, < 2026.3.1027
Mitigation
Upgrade to Telerik Document Processing Libraries 2026.3.1027 (see KB advisory); constrain tool-argument paths to the intended output directory.