CVE-2026-25636

calibre has a Path Traversal Leading to Arbitrary File Corruption and Code Execution

State: Published
Severity: 8.2 High
Published: Feb 6, 2026
Updated: Feb 11, 2026
Reserved: Feb 4, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.2 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-73 External Control of File Name or Path
CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

Product	Versions
calibrekovidgoyal	< 9.2.0Affected

References

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