CVE-2026-25636 HIGH

CVE-2026-25636: calibre has a Path Traversal Leading to Arbitrary File Corruption and Code Execution

Vendor Kovidgoyal
Product calibre
Weakness CWE-22 · Path traversal
Published February 6, 2026
Last update February 11, 2026
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H

What the vulnerability does

01Description

calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerability in Calibre's EPUB conversion allows a malicious EPUB file to corrupt arbitrary existing files writable by the Calibre process. During conversion, Calibre resolves CipherReference URI from META-INF/encryption.xml to an absolute filesystem path and opens it in read-write mode, even when it points outside the conversion extraction directory. This vulnerability is fixed in 9.2.0.

Key dates

02Disclosure timeline

February 6, 2026 CVE published
February 11, 2026 Record updated