CVE-2026-33206 | THREATINT

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.

PUBLISHED Reserved 2026-03-17 | Published 2026-03-27 | Updated 2026-03-27 | Assigner GitHub_M

HIGH: 8.2CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Problem types

CWE-23: Relative Path Traversal

Product status

< 9.6.0

affected

References

github.com/...alibre/security/advisories/GHSA-h3p4-m74f-43g6 exploit

github.com/...alibre/security/advisories/GHSA-h3p4-m74f-43g6

cve.org (CVE-2026-33206)

nvd.nist.gov (CVE-2026-33206)

Download JSON