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    CVE-2026-33205

    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.

    Published:Mar 27, 2026
    Last Modified:Mar 31, 2026
    EPS:Mar 27, 2026
    EPSS Score:0.00012
    CVSS Score:5.5

    Affected Products

    Vendor
    Calibre-ebook
    Product
    Calibre
    Vendor
    Kovidgoyal
    Product
    Calibre

    Exploits

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

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Related CVEs

    CVE-2026-33206 (CVSS 8.2) — calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to …
    CVE-2026-30853 (CVSS 5) — calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to …
    CVE-2026-27824 (CVSS 5.3) — calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to …
    CVE-2026-27810 (CVSS 6.4) — calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to …
    CVE-2026-26065 (CVSS 9.3) — calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions …
    CVE-2026-26064 (CVSS 9.3) — calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions …
    CVE-2026-25731 (CVSS 7.8) — calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre…
    CVE-2026-25635 (CVSS 8.6) — calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnerability tha…
    CVE-2026-25636 (CVSS 8.2) — calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerability in Calibre's EPUB conversio…
    CVE-2024-7009 (CVSS 4.2) — Unsanitized user-input in Calibre <= 7.15.0 allow users with permissions to perform full-text searches to achi…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High