SecuriTricks - CVE-2026-30853

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.

Product(s) Impacted

Vendor	Product	Versions
Calibre	Calibre	<9.5.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	calibre	calibre	<9.5.0	/	/	/	/	/	/	/

References

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

CVSS Score

5.0 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: LOW
Privileges Required: NONE
Scope: CHANGED
Confidentiality Impact: NONE
Integrity Impact: LOW
Availability Impact: LOW

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

View Vector String

Timeline

Published: March 13, 2026, 7:54 p.m.
Last Modified: March 13, 2026, 7:54 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-30853