CVE-2026-33205 MEDIUM

CVE-2026-33205: calibre has Server-Side Request Forgery in ebook viewer backend

Vendor Kovidgoyal
Product calibre
Weakness CWE-918 · SSRF
Published March 27, 2026
Last update March 27, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 27, 2026 CVE published
March 27, 2026 Record updated