CVE-2026-33205
Medium
Description
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.
SeverityMedium
CVSS5.5
Exploit probability—
ProductCalibre
PublishedMar 27, 2026
First seenMar 27, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- calibre-ebook calibre9.6.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| calibre-ebook calibre | v < 9.6.0 | 9.6.0 |
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