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 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.

CVSS v3 6.3 MEDIUM

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6	Exploit Vendor Advisory
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*

History

30 Mar 2026, 20:46

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.3
References	~~() https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6 -~~	() https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6 - Exploit, Vendor Advisory
CPE		cpe:2.3:a:calibre-ebook:calibre::::::::
First Time		Calibre-ebook calibre Calibre-ebook

Information

Published : 2026-03-27 15:16

Updated : 2026-03-30 20:46

NVD link : CVE-2026-33206

Mitre link : CVE-2026-33206

CVE.ORG link : CVE-2026-33206

JSON object : View

Products Affected

calibre-ebook

calibre

CWE

CWE-23

Relative Path Traversal

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