Bug 2441261 (CVE-2026-26065)

Summary:	CVE-2026-26065 calibre: Calibre: Arbitrary file write and code execution via path traversal in PDB readers
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	kfenzi
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in calibre. This path traversal vulnerability allows a local user to write arbitrary files with arbitrary content and extensions to any location where the user has write permissions. This occurs when processing specially crafted PDB (Program Database) e-book files. Successful exploitation can lead to potential arbitrary code execution and Denial of Service (DoS) through file corruption.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-07-12 20:03:59 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2441321
Bug Blocks:

Description OSIDB Bzimport 2026-02-20 03:01:37 UTC

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.

Comment 2 Kevin Fenzi (rh) 2026-07-12 20:03:59 UTC

This was fixed in feb.