VDB
CVE-2026-26064
CVE-2026-26064
PUBLISHED
CVSS 9.300000190734863 CRITICAL
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.
EPSS 0.88% · 56.7th percentile
Risk Scores
CVSS 4.0
9.300000190734863
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS Score
0.88%
56.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| calibre-ebook | calibre | 0, 0 |
| kovidgoyal | calibre | < 9.3.0, < 9.3.0 |
Timeline
- Feb 10, 2026 CVE ID Reserved
- Feb 20, 2026 EPSS Score
- Feb 20, 2026 CVE Published
- Feb 20, 2026 PoC Published
- Feb 20, 2026 PoC Published
- Feb 20, 2026 CVE Updated
- Feb 20, 2026 PoC Published
- Feb 22, 2026 EPSS Score
- Feb 24, 2026 EPSS Score
- Feb 26, 2026 EPSS Score
- Feb 28, 2026 EPSS Score
- Mar 1, 2026 EPSS Score