Description
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.
Published: 2026-08-11
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Wed, 12 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 12 Aug 2026 12:30:00 +0000

Type Values Removed Values Added
First Time appeared Kovidgoyal
Kovidgoyal calibre
Vendors & Products Kovidgoyal
Kovidgoyal calibre

Tue, 11 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
Description 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.
Title calibre Content Server `/book-update-annotations` Missing Write Authorization Check Allows Unauthorized Annotation Modification
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}


Subscriptions

Kovidgoyal Calibre
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-12T12:43:31.031Z

Reserved: 2026-08-11T17:18:01.597Z

Link: CVE-2026-73249

cve-icon Vulnrichment

Updated: 2026-08-12T12:43:27.235Z

cve-icon NVD

Status : Received

Published: 2026-08-11T22:19:05.687

Modified: 2026-08-12T13:17:26.097

Link: CVE-2026-73249

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-12T12:15:04Z

Weaknesses