CVE-2026-53511 | THREATINT

Description

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.

PUBLISHED Reserved 2026-06-09 | Published 2026-07-07 | Updated 2026-07-09 | Assigner GitHub_M

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

Problem types

CWE-94: Improper Control of Generation of Code ('Code Injection')

Product status

< 9.10.0

affected

References

github.com/...alibre/security/advisories/GHSA-2j4m-2q7x-2c47 exploit

github.com/...alibre/security/advisories/GHSA-2j4m-2q7x-2c47

github.com/...ommit/712f4e1ff5c1e798c335bef3bacc4efdee052e9c

github.com/kovidgoyal/calibre/releases/tag/v9.10.0

cve.org (CVE-2026-53511)

nvd.nist.gov (CVE-2026-53511)

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