CVE-2026-25636 — Path Traversal in Calibre

CWE-22 — Path TraversalCWE-73 — External Control of File Name or PathCWE-94 — Code Injection5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 92.87%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Kovidgoyal CalibreCalibre-ebook CalibreDebian Calibre
Timeline
PublishedFeb 6

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

▶debiandebian/calibre< calibre 9.2.0+ds+~0.10.5-1 (forky)
▶CVEListV5kovidgoyal/calibre< 9.2.0
▶Debiankovidgoyal/calibre< 9.2.0+ds+~0.10.5-1

Patches

Patch: github.com ↗

🔴Vulnerability Details

1
OSV
CVE-2026-25636: calibre is an e-book manager↗2026-02-06
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📋Vendor Advisories

2
Red Hat
calibre: Calibre: Arbitrary file corruption via path traversal in EPUB conversion↗2026-02-06
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Debian
CVE-2026-25636: calibre - calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerabili...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-25636 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-25636 — Path Traversal in Kovidgoyal Calibre | cvebase