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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-862"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73249.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "9.12.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "71295e8b62801e1ccecaa4fac47e6942f11cfe1e"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v9.12.0",
"range": [
{
"fixed": "993dd952284ce4bb8199ddeef20643f94bb0b437"
}
],
"source": "REFERENCES_TAG"
}
]
}