CVE-2026-33205

MEDIUM

calibre has Server-Side Request Forgery in ebook viewer backend

Title source: cna

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.

References (1)

[X_Refsource_Confirm] https://github.com/kovidgoyal/calibre/security/advisories/GHSA-4926-v9px-wv7v

Scores

CVSS v3 5.5

EPSS 0.0001

EPSS Percentile 2.8%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-918

Status published

Products (2)

calibre-ebook/calibre < 9.6.0

kovidgoyal/calibre < 9.6.0

Published Mar 27, 2026

Tracked Since Mar 29, 2026