CVE-2026-25636

🔴 HIGH

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...

Published
Feb 06, 2026
Last Modified
Feb 11, 2026
Views
12
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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.

CVSS Scores

CVSS 3.1 8.2
8.2
HIGH
CVSS 2.0 8.2

Additional Information

Source
security-advisories@github.com
State
Undergoing analysis

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