CVE-2026-73248

Summary

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.

Affected Software

VendorProductVersion RangeStatus
kovidgoyalcalibre< 9.12.0affected

Weaknesses

  • CWE-94: CWE-94: Improper Control of Generation of Code ('Code Injection')
  • CWE-95: CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

References