CVE-2026-25636

7.8 highEPSS 0.2%

High (7.8) in calibre-ebook calibre. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.8 high

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-31)
CWEs: CWE-22, CWE-73, CWE-94
Published: 2026-02-06
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

calibre-ebook:calibre

References

https://github.com/kovidgoyal/calibre/commit/9484ea82c6ab226c18e6ca5aa000fa16de598726
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-8r26-m7j5-hm29
https://0x5t.raptx.org/posts/calibre-epub-rce

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