{
  "cveId": "CVE-2026-27810",
  "url": "https://patchblox.com/security/cve/CVE-2026-27810",
  "summary": "CVE-2026-27810 is fixed in calibre on 1 platform, first by DEBIAN-CVE-2026-27810, released February 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "calibre: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books",
  "description": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, an HTTP Response Header Injection vulnerability in the calibre Content Server allows any authenticated user to inject arbitrary HTTP headers into server responses via an unsanitized \u0060content_disposition\u0060 query parameter in the \u0060/get/\u0060 and \u0060/data-files/get/\u0060 endpoints. All users running the calibre Content Server with authentication enabled are affected. The vulnerability is exploitable by any authenticated user and can also be triggered by tricking an authenticated victim into clicking a crafted link. Version 9.4.0 contains a fix for the issue.",
  "published": "2026-02-27T20:21:39Z",
  "severity": "medium",
  "cvss": 6.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
  "epss": 0.00242,
  "epssPercentile": 0.1541,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "calibre",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.13.0\u002Brepack-2\u002Bdeb12u6",
      "fix": "DEBIAN-CVE-2026-27810",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-27810",
      "released": "2026-02-27T20:21:39Z"
    },
    {
      "platform": "linux",
      "product": "calibre",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "8.5.0\u002Bds-1\u002Bdeb13u2",
      "fix": "DEBIAN-CVE-2026-27810",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-27810",
      "released": "2026-02-27T20:21:39Z"
    },
    {
      "platform": "linux",
      "product": "calibre",
      "release": "Debian 14",
      "fixedVersion": "9.4.0\u002Bds\u002B~0.10.5-1",
      "fix": "DEBIAN-CVE-2026-27810",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-27810",
      "released": "2026-02-27T20:21:39Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}