calibre: calibre is an e-book manager
CVE-2026-53511 is fixed in calibre on 1 platform, first by DEBIAN-CVE-2026-53511, released July 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| calibre · Debian 12.15 (bookworm) | 6.13.0+repack-2+deb12u10 | DEBIAN-CVE-2026-53511 | Jul 8, 2026 |
| calibre · Debian 14 | 9.10.0+ds+~0.10.6-1 | DEBIAN-CVE-2026-53511 | Jul 8, 2026 |
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