CVE-2026-25636

8.2 HIGH
Published: February 06, 2026 Modified: February 17, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-8r26-m7j5-hm29
Source: security-advisories@github.com
Exploit Third Party Advisory
https://0x5t.raptx.org/posts/calibre-epub-rce
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Third Party Advisory

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.2 / 10.0
EPSS (Exploit Probability)
0.0%
6th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

calibre-ebook