RCE in Calibre-ebook Calibre
CVE-2026-25636
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 re…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.002 (11.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H.
Affected products
- Calibre-ebook Calibre
- Kovidgoyal Calibre — versions < 9.2.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-25636?
- CVE-2026-25636 is a high-severity vulnerability in Calibre-ebook Calibre, classified under Path Traversal. CVSS score: 8.2/10. Published 2026-02-06.
- How severe is CVE-2026-25636?
- High severity. CVSS v3 base score is 8.2 out of 10.