{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "9.12.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "71295e8b62801e1ccecaa4fac47e6942f11cfe1e"
            },
            {
              "fixed": "993dd952284ce4bb8199ddeef20643f94bb0b437"
            }
          ],
          "repo": "https://github.com/kovidgoyal/calibre",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-5x64-w63v-x2g6"
  ],
  "database_specific": {
    "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"
  },
  "details": "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.",
  "id": "CVE-2026-73249",
  "modified": "2026-08-14T03:51:38.452285153Z",
  "published": "2026-08-11T21:58:43.415Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kovidgoyal/calibre/releases/tag/v9.12.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73249.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-5x64-w63v-x2g6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73249"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kovidgoyal/calibre/commit/71295e8b62801e1ccecaa4fac47e6942f11cfe1e"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "calibre Content Server `/book-update-annotations` Missing Write Authorization Check Allows Unauthorized Annotation Modification"
}