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Vulnerability details: VCID-dywq-dzuv-wka2
Vulnerability ID VCID-dywq-dzuv-wka2
Aliases CVE-2026-33206
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 7.4
Risk 3.7
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-23 Relative Path Traversal
System Score Found at
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-33206
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-33206
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-33206
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-33206
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-33206
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-33206
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-33206
cvssv4 8.2 https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6
ssvc Track https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-33206
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33206
GHSA-h3p4-m74f-43g6 https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6
No exploits are available.
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 Found at https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

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passive

active

high

low

none

high

low

none

high

low

none

high

low

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low

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Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-27T14:48:39Z/ Found at https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6
Exploit Prediction Scoring System (EPSS)
Percentile 0.01609
EPSS Score 0.00012
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T16:39:30.473895+00:00 Debian Oval Importer Import https://www.debian.org/security/oval/oval-definitions-bullseye.xml.bz2 38.0.0