Arbitrary Code Injection Affecting calibre package, versions <9.10.0+ds+~0.10.6-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published9 Jul 2026
- disclosed7 Jul 2026
Introduced: 7 Jul 2026
CVE-2026-53511 (opens in a new tab)How to fix?
Upgrade Debian:unstable calibre to version 9.10.0+ds+~0.10.6-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream calibre package and not the calibre package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-53511
- https://github.com/kovidgoyal/calibre/commit/712f4e1ff5c1e798c335bef3bacc4efdee052e9c
- https://github.com/kovidgoyal/calibre/releases/tag/v9.10.0
- https://lists.debian.org/debian-lts-announce/2026/08/msg00034.html
- https://github.com/kovidgoyal/calibre/security/advisories/GHSA-2j4m-2q7x-2c47