CVE-2026-33206

calibre has a path traversal vulnerability

State: Published
Severity: 8.2 High
Published: Mar 27, 2026
Updated: Mar 27, 2026
Reserved: Mar 17, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.2 High	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	GitHub_M

Weaknesses

CWE-23 Relative Path Traversal

Affected Products

Product	Versions
calibrekovidgoyal	< 9.6.0Affected

References

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6

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