CVE-2026-33206 HIGH

CVE-2026-33206: calibre has a path traversal vulnerability

Vendor Kovidgoyal
Product calibre
Weakness CWE-23
Published March 27, 2026
Last update March 27, 2026

CVSS base score

8.2/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 27, 2026 CVE published
March 27, 2026 Record updated