CVE-2026-25636: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in kovidgoyal calibre
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-2026-25636: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in kovidgoyal calibre
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.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-02-04T05:15:41.790Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69864f52f9fa50a62f30f2e5
Added to database: 2/6/2026, 8:30:10 PM
Last updated: 2/6/2026, 8:30:19 PM
Views: 1
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