CVE-2026-25636

HIGH

8.2

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.

CVE Details

CVSS v3.1 Score8.2

SeverityHIGH

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

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published2/6/2026

Last Modified2/17/2026

Sourcenvd

Honeypot Sightings0

Affected Products

calibre-ebook:calibre

Weaknesses (CWE)

CWE-22CWE-73CWE-94CWE-22

References

https://github.com/kovidgoyal/calibre/commit/9484ea82c6ab226c18e6ca5aa000fa16de598726(security-advisories@github.com)

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-8r26-m7j5-hm29(security-advisories@github.com)

https://0x5t.raptx.org/posts/calibre-epub-rce(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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