Missing Authorization Affecting calibre package, versions <9.12.0+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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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-CALIBRE-18674828
- published12 Aug 2026
- disclosed11 Aug 2026
Introduced: 11 Aug 2026
NewCVE-2026-73249 (opens in a new tab)How to fix?
Upgrade Debian:unstable calibre to version 9.12.0+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 9.12.0, the calibre Content Server endpoint POST /book-update-annotations/{library_id}/{book_id}/{fmt} in src/calibre/srv/books.py omits needs_db_write=True, causing Router.dispatch() to skip ctx.check_for_write_access() before update_annotations() passes attacker-controlled JSON to db.merge_annotations_for_book(), which allows a readonly user or an anonymous user on an unauthenticated deployment to persist unauthorized book annotation changes. This issue is fixed in version 9.12.0.