VDB

CVE-2026-53511

CVE-2026-53511 PUBLISHED CVSS 8.5 HIGH

Reported by GitHub_M · Published July 7, 2026

calibre is an e-book manager. Prior to 9.10.0, a malicious EPUB, OPF, or PDF file can execute arbitrary Python code when its metadata is read by calibre, including through Add books or Edit books, by embedding a custom column definition with a python: template in calibre:user_metadata that is passed unsanitized to exec() in the template formatter. This issue is fixed in version 9.10.0.

Risk Scores

CVSS 4.0
8.5
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected Products

VendorProductVersions
kovidgoyalcalibre< 9.10.0
kovidgoyalcalibre< 9.10.0, < 9.10.0, < 9.10.0

Timeline

  • Jun 27, 2026 CVE Published
  • Jul 8, 2026 EPSS Score
  • Jul 8, 2026 Coalition ESS Score
  • Aug 7, 2026 EPSS Score
  • Aug 29, 2026 Security Advisory

References

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