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CVE-2026-33205

MEDIUM CVSS 4.0: 4.8 EPSS 0.01%
Updated Mar 30, 2026
Calibre-Ebook
Parameter Value
CVSS 4.8 (MEDIUM)
Affected Versions before 9.6.0
Fixed In 9.6.0
Type CWE-918 (Server-Side Request Forgery (SSRF))
Vendor Calibre-Ebook
Public PoC No

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a Server-Side Request Forgery vulnerability in the background-image endpoint of calibre e-book reader's web view allows an attacker to perform blind GET requests to arbitrary URLs and exfiltrate information out from the ebook sandbox. Version 9.6.0 patches the issue.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption

CVSS Vector v4.0

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Calibre-Ebook Calibre
cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*
9.6.0