calibre: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books
CVE-2026-26064 is fixed in calibre on 1 platform, first by DEBIAN-CVE-2026-26064, released February 20, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| calibre · Debian 12.15 (bookworm) | 6.13.0+repack-2+deb12u6 | DEBIAN-CVE-2026-26064 | Feb 20, 2026 |
| calibre · Debian 13.5 (trixie) | 8.5.0+ds-1+deb13u2 | DEBIAN-CVE-2026-26064 | Feb 20, 2026 |
| calibre · Debian 14 | 9.3.0+ds+~0.10.5-1 | DEBIAN-CVE-2026-26064 | Feb 20, 2026 |
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