Bug 2437730 (CVE-2026-25636) - CVE-2026-25636 calibre: Calibre: Arbitrary file corruption via path traversal in EPUB conversion
Summary: CVE-2026-25636 calibre: Calibre: Arbitrary file corruption via path traversal...
Keywords:
Status: NEW
Alias: CVE-2026-25636
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2437956 2437960
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-09 11:02 UTC by OSIDB Bzimport
Modified: 2026-02-09 12:47 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-02-09 11:02:45 UTC 
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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