CVE-2026-33206: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a path traversal vulnerability…

PriorityP335medium6.3CVSS 3.1

AVLACLPRNUIRSCCHINAN

EPSS

0.21%

11.0th percentile

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a path traversal vulnerability exists in Calibre' handling of images in Markdown and other similar text-based files allowing an attacker to include arbitrary files from the file system into the converted book. Additionally, missing authentication and server-side request forgery in the background-image endpoint in the ebook reader web view allow the files to be exfiltrated without additional interaction. Version 9.6.0 contains a fix.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
calibre-ebook	calibre	< 9.6.0	9.6.0
debian	calibre	< calibre 9.6.0+ds+~0.10.5-1 (forky)	calibre 9.6.0+ds+~0.10.5-1 (forky)
kovidgoyal	calibre	< 9.6.0	9.6.0
kovidgoyal	calibre	>= 0 < 9.6.0+ds+~0.10.5-1	9.6.0+ds+~0.10.5-1

CVSS provenance

nvdv3.16.3MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

nvdv4.08.2HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

osv8.2HIGH

vendor_debian8.2HIGH

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