VULNERABILITY INTELLIGENCE
CVE-2026-73248
EPSS probability0.20%
CISA KEVNot currently listed
Published2026-08-11
Last modified2026-10-24
Description
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.
Weakness classification
- security-advisories@github.com: CWE-94