{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.6.0"
              },
              {
                "fixed": "0.6.4.1"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "0.5.15"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "567518cae5500f7c4776a1fd4e9bbd599e98b9bf"
            },
            {
              "fixed": "357f3b5aee4d2140635b6ba242fbb952491e2d28"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "ce20fc8e9974ed87d0848dc411eef490623cdeb9"
            }
          ],
          "repo": "https://github.com/ruby/net-imap",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8p34-64r3-mwg8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-77",
      "CWE-93"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47240.json"
  },
  "details": "Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a \"raw data\" argument that is sent verbatim after validation to prevent command injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject arbitrary IMAP commands inside non-synchronizing literals.  A server without support for non-synchronizing literals may interpret the \"+}\\r\\n\" as the end of a malformed command line and respond with a tagged BAD. In that case, the contents of the literal will be interpreted as one or more new pipelined commands, allowing a CRLF command injection attack to succeed. This affects criteria for #search and #uid_search; search_keys for #sort, #thread, #uid_sort, and #uid_thread; and attr for #fetch and #uid_fetch. This vulnerability is fixed in 0.6.5 and 0.5.15.",
  "id": "CVE-2026-47240",
  "modified": "2026-07-08T05:37:52.322359711Z",
  "published": "2026-06-22T20:17:15.376Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47240.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ruby/net-imap/security/advisories/GHSA-8p34-64r3-mwg8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47240"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Net::IMAP: Command Injection via non-synchronizing literal in \"raw\" argument"
}