{"id":"CVE-2026-73248","title":"calibre is an e-book manager","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 inhe…","severity":"none","cwe":["CWE-94","CWE-95"],"published":"2026-08-11","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:55:04.493","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73248","references":[{"url":"https://github.com/kovidgoyal/calibre/commit/dac9990458374a81a5372a768bba6527d965aac8","label":"security-advisories@github.com"},{"url":"https://github.com/kovidgoyal/calibre/releases/tag/v9.12.0","label":"security-advisories@github.com"},{"url":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-4f7g-rjfp-hmvx","label":"security-advisories@github.com"},{"url":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-4f7g-rjfp-hmvx","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00213,"epssPercentile":0.1186,"ingestedAt":"2026-09-09T21:22:45.530Z","slug":"CVE-2026-73248","body":"## Overview\n\ncalibre 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}