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CVE-2026-33205

calibre has Server-Side Request Forgery in ebook viewer backend

Published: Mar 27, 2026Updated: Mar 30, 2026 Sources: CVE List NVDCWE-918
5.5MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 93.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:HI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-918

Affected Products

calibre-ebook
oss-projectaka calibre
calibreOn-prem
Consumer Software / productivity
kovidgoyal
individual-devaka calibre, kitty
calibreOn-prem
Consumer Software / productivity

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

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

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