CVE-2026-30853 MEDIUM

CVE-2026-30853: calibre has a Path Traversal Leading to Arbitrary File Write

Vendor Kovidgoyal
Product calibre
Weakness CWE-22 · Path traversal
Published March 13, 2026
Last update March 13, 2026
View on NVD All CVEs

CVSS base score

5.0/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to 9.5.0, a path traversal vulnerability in the RocketBook (.rb) input plugin (src/calibre/ebooks/rb/reader.py) allows an attacker to write arbitrary files to any path writable by the calibre process when a user opens or converts a crafted .rb file. This is the same bug class fixed in CVE-2026-26065 for the PDB readers, but the fix was never applied to the RB reader. This vulnerability is fixed in 9.5.0.

Key dates

02Disclosure timeline

March 13, 2026 CVE published
March 13, 2026 Record updated