CVE-2026-33206
calibre has a path traversal vulnerability
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.
INFO
Published Date :
March 27, 2026, 3:16 p.m.
Last Modified :
March 30, 2026, 8:46 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Calibre to version 9.6.0 or later.
- Apply vendor patches for identified vulnerabilities.
- Review related web server configurations.
- Restrict access to sensitive files.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33206.
| URL | 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 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33206 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33206
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33206 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33206 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:* versions up to (excluding) 9.6.0 Added Reference Type CISA-ADP: https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6 Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6 Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Mar. 27, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-23 Added Reference https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 27, 2026
Action Type Old Value New Value Added Reference https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6