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Vulnerability IntelligenceCVE-2026-33205

CVE-2026-33205

MEDIUM5.5

calibre has Server-Side Request Forgery in ebook viewer backend

Published Mar 27, 2026

Modified 1 months ago

Details

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

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

https://www.cve.org/CVERecord?id=CVE-2026-33205

CVSS Analysis

CVSS v4.0

4.8

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Attack Requirements

NoneAT:N

Privileges Required

NonePR:N

User Interaction

PassiveUI:P

Vulnerable System

Vuln. Confidentiality

LowVC:L

Vuln. Integrity

NoneVI:N

Vuln. Availability

NoneVA:N

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

4.8/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

Weakness Type (CWE)

Input Validation

Server-Side Request Forgery (SSRF)

Ecosystems

Timeline

PublishedMar 27, 2026

ModifiedMar 27, 2026

CVE-2026-33205 | Mondoo Vulnerability Intelligence