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.

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Advisories

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Fixes

Solution

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Workaround

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History

Fri, 13 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 13 Mar 2026 19:15:00 +0000

Type Values Removed Values Added
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.
Title calibre has a Path Traversal Leading to Arbitrary File Write
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-13T19:42:26.573Z

Reserved: 2026-03-05T21:27:35.341Z

Link: CVE-2026-30853

cve-icon Vulnrichment

Updated: 2026-03-13T19:42:23.416Z

cve-icon NVD

Status : Received

Published: 2026-03-13T19:54:35.077

Modified: 2026-03-13T19:54:35.077

Link: CVE-2026-30853

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses