HOMEVULNERABILITIESCVE-2026-33205
MEDIUM

CVE-2026-33205

CWE-918Published: March 27, 2026· Updated: Mar 30, 2026

5.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.4th

Official 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.

NVD Source

Technical Analysis

CVE-2026-33205 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected Vendors & Products

calibre-ebook1 product
calibre
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

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

All References (1)

→
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-4926-v9px-wv7vExploit · Vendor Advisory

Quick Facts

CVE IDCVE-2026-33205
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-918
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMar 27, 2026

Related CVEs (CWE-918)

CVE-2026-26150
10.0
CVE-2026-13773
10.0
CVE-2026-32169
10.0
CVE-2026-26138
10.0
CVE-2026-35431
10.0
CVE-2026-2053
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33205 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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