{
  "cveId": "CVE-2026-12143",
  "url": "https://patchblox.com/security/cve/CVE-2026-12143",
  "summary": "CVE-2026-12143 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-12143, released June 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "form-data does not escape CR/LF/quote in multipart field names and filenames (CRLF injection)",
  "description": "form-data is a library for creating readable multipart/form-data streams. In versions through 4.0.5, the \u0060field\u0060 argument to \u0060FormData#append\u0060 and the \u0060filename\u0060 option are concatenated verbatim into the \u0060Content-Disposition\u0060 header without escaping carriage return (CR), line feed (LF), or double-quote (\u0022) characters. An application that passes attacker-controlled data as a field name or filename (for example, an API gateway that turns JSON object keys into multipart field names) allows the attacker to terminate the header line and inject additional headers, or to smuggle entire additional multipart parts, into the request the application forwards to a backend. This can let the attacker add or override form fields (e.g. set \u0060is_admin=true\u0060) seen by the downstream parser. This is an instance of CWE-93 (CRLF injection). The fix escapes CR, LF, and \u0060\u0022\u0060 as \u0060%0D\u0060, \u0060%0A\u0060, and \u0060%22\u0060 in field names and filenames, matching the serialization browsers use per the WHATWG HTML multipart/form-data encoding algorithm. Exploitation requires the consuming application to use untrusted input as a field name or filename; applications that use only fixed/trusted field names are not affected. Fixed in 2.5.6, 3.0.5, and 4.0.6.",
  "published": "2026-06-12T18:01:30Z",
  "severity": "Important",
  "cvss": 7.5,
  "cwe": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)",
  "epss": 0.00669,
  "epssPercentile": 0.52224,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-12143",
  "fixes": [
    {
      "platform": "linux",
      "product": "agama-web-ui",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "17\u002B673.b97ba64d6-160000.12.1",
      "fix": "OPENSUSE-SU-2026:21448-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21448-1",
      "released": "2026-07-27T15:55:38Z"
    },
    {
      "platform": "linux",
      "product": "node-form-data",
      "release": "Debian 14",
      "fixedVersion": "4.0.6\u002B~2.1.0-1",
      "fix": "DEBIAN-CVE-2026-12143",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-12143",
      "released": "2026-06-27T17:39:39Z"
    },
    {
      "platform": "linux",
      "product": "python-jupytext",
      "release": "Fedora 43",
      "fixedVersion": "1.19.6-1.fc43",
      "fix": "FEDORA-2026-3942AB86FD",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-3942ab86fd",
      "released": "2026-10-05T19:44:23Z"
    },
    {
      "platform": "linux",
      "product": "python-jupytext-doc",
      "release": "Fedora 43",
      "fixedVersion": "1.19.6-1.fc43",
      "fix": "FEDORA-2026-3942AB86FD",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-3942ab86fd",
      "released": "2026-10-05T19:44:23Z"
    },
    {
      "platform": "linux",
      "product": "python3-jupyterlab-jupytext",
      "release": "Fedora 43",
      "fixedVersion": "1.19.6-1.fc43",
      "fix": "FEDORA-2026-3942AB86FD",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-3942ab86fd",
      "released": "2026-10-05T19:44:23Z"
    },
    {
      "platform": "linux",
      "product": "python3-jupytext",
      "release": "Fedora 43",
      "fixedVersion": "1.19.6-1.fc43",
      "fix": "FEDORA-2026-3942AB86FD",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-3942ab86fd",
      "released": "2026-10-05T19:44:23Z"
    },
    {
      "platform": "linux",
      "product": "rh-podman-desktop",
      "release": "RHEL 10",
      "fixedVersion": "1.1.2-1.el10_2",
      "fix": "RHSA-2026:57590",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-57590",
      "released": "2026-08-21T23:39:10Z"
    }
  ],
  "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"
  }
}