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CVE-2026-30853

calibre has a Path Traversal Leading to Arbitrary File Write

Published: Mar 13, 2026Updated: Mar 18, 2026 Sources: CVE List NVDCWE-22
NVD MITRE
5.0CVSSMEDIUM
EPSS Score
0.2%
Top 92.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:CC:NI:LA:L
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-22

Affected Products

calibrekovidgoyal
On-prem
Consumer Software / productivity
calibrecalibre-ebook
On-prem
Consumer Software / productivity
kovidgoyalindividual-devConsumer Softwareaka calibre, kitty
calibre-ebookoss-projectConsumer Softwareaka calibre

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-7mp7-rfrg-542x
github.com

Timeline

Published
Mar 13, 2026
Last Updated
Mar 18, 2026

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