CVE-2026-25636

HIGH

calibre < 9.2.0 - Path Traversal and Arbitrary File Write via EPUB Conversion

Title source: llm
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 8.2
EPSS 0.0020
EPSS Percentile 9.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-22 CWE-94 CWE-73
Status published
Products (1)
calibre-ebook/calibre < 9.2.0
Published Feb 06, 2026
Tracked Since Feb 18, 2026