CVE-2026-73249
published 2026-08-11CVE-2026-73249: 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…
PriorityP347high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
0.25%
15.9th percentile
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.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| kovidgoyal | calibre | < 9.12.0 | 9.12.0 |
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No advisories linked to this vulnerability.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-73249 calibre: Calibre Content Server: Unauthorized book annotation modification via missing authorization check [fedora-all]
bugzilla·2026-08-12·CVSS 7.5
CVE-2026-73249 [HIGH] CVE-2026-73249 calibre: Calibre Content Server: Unauthorized book annotation modification via missing authorization check [fedora-all]
CVE-2026-73249 calibre: Calibre Content Server: Unauthorized book annotation modification via missing authorization check [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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
Bugzilla
CVE-2026-73249 calibre: Calibre Content Server: Unauthorized book annotation modification via missing authorization check
bugzilla·2026-08-11·CVSS 7.5
CVE-2026-73249 [HIGH] CVE-2026-73249 calibre: Calibre Content Server: Unauthorized book annotation modification via missing authorization check
CVE-2026-73249 calibre: Calibre Content Server: Unauthorized book annotation modification via missing authorization check
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.
2026-08-11
Published