CVE Feed

    Dashboard / CVE / CVE-2026-73248

    CVE-2026-73248

    calibre is an e-book manager. Prior to 9.12.0, calibre processes attacker-controlled composite_template metadata from a malicious EPUB, OPF, PDF, or similar file through program: and a nested template() call whose formatter does not inherit allow_python_templates=False, allowing a nested python: template to reach compile_python_template and execute arbitrary Python code when the file is opened or imported. This issue is fixed in version 9.12.0.

    Published:Aug 11, 2026
    Last Modified:Aug 12, 2026
    EPS:Aug 11, 2026
    EPSS Score:0.00149
    CVSS Score:8.5

    Affected Products

    Vendor
    Kovidgoyal
    Product
    Calibre

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-73249 (CVSS 7.5) — calibre is an e-book manager. Prior to 9.12.0, the calibre Content Server endpoint POST /book-update-annotatio…
    CVE-2026-53511 (CVSS 8.5) — calibre is an e-book manager. Prior to 9.10.0, a malicious EPUB, OPF, or PDF file can execute arbitrary Python…
    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-2026-33205 (CVSS 4.8) — 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…

    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