CVE-2026-26064

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62	Patch
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-20 02:16

Updated : 2026-02-20 16:53

NVD link : CVE-2026-26064

Mitre link : CVE-2026-26064

CVE.ORG link : CVE-2026-26064

JSON object : View

Products Affected

calibre-ebook

calibre

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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