CVE-2026-30853

MEDIUM

calibre < 9.5.0 - Path Traversal and Arbitrary File Write via RocketBook Input Plugin

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.0
EPSS 0.0021
EPSS Percentile 10.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-22
Status published
Products (2)
calibre-ebook/calibre < 9.5.0
kovidgoyal/calibre < 9.5.0
Published Mar 13, 2026
Tracked Since Mar 14, 2026