{"id":"CVE-2026-73249","state":"PUBLISHED","title":"calibre Content Server `/book-update-annotations` Missing Write Authorization Check Allows Unauthorized Annotation Modification","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.","publishedAt":"2026-08-11T21:58:43.415Z","updatedAt":"2026-08-12T12:43:31.031Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["kovidgoyal calibre"],"affected":[{"vendor":"kovidgoyal","product":"calibre","versions":[{"version":"< 9.12.0","status":"affected"}]}],"references":["https://github.com/kovidgoyal/calibre/security/advisories/GHSA-5x64-w63v-x2g6","https://github.com/kovidgoyal/calibre/commit/71295e8b62801e1ccecaa4fac47e6942f11cfe1e","https://github.com/kovidgoyal/calibre/releases/tag/v9.12.0"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73249.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73249","state":"PUBLISHED","datePublished":"2026-08-11T21:58:43.415Z","dateUpdated":"2026-08-12T12:43:31.031Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-11T17:18:01.597Z"},"containers":{"cna":{"title":"calibre Content Server `/book-update-annotations` Missing Write Authorization Check Allows Unauthorized Annotation Modification","descriptions":[{"lang":"en","value":"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":[{"vendor":"kovidgoyal","product":"calibre","versions":[{"version":"< 9.12.0","status":"affected"}]}],"references":[{"url":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-5x64-w63v-x2g6","name":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-5x64-w63v-x2g6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/kovidgoyal/calibre/commit/71295e8b62801e1ccecaa4fac47e6942f11cfe1e","name":"https://github.com/kovidgoyal/calibre/commit/71295e8b62801e1ccecaa4fac47e6942f11cfe1e","tags":["x_refsource_MISC"]},{"url":"https://github.com/kovidgoyal/calibre/releases/tag/v9.12.0","name":"https://github.com/kovidgoyal/calibre/releases/tag/v9.12.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-11T21:58:43.415Z"},"source":{"advisory":"GHSA-5x64-w63v-x2g6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-5x64-w63v-x2g6","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-12T12:41:56.031175Z","id":"CVE-2026-73249","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-12T12:43:31.031Z"}}]}}}