calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution
Summary
calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution
Original description
The description as published by the source.
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below contain a Path Traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows, this leads to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. Function extract_pictures only checks startswith('Pictures'), and does not sanitize '..' sequences. calibre's own ZipFile.extractall() in utils/zipfile.py does sanitize '..' via _get_targetpath(), but extract_pictures() bypasses this by using manual zf.read() + open(). This issue has been fixed in version 9.3.0.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-26064 calibre Fixed in: 5.12.0+dfsg-1+deb11u4
- Ubuntu UBUNTU-CVE-2026-26064 calibre
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com