{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-42257",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-13T19:27:16.888782Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-13T19:33:13.948Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "net-imap",
          "vendor": "ruby",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.4.24"
            },
            {
              "status": "affected",
              "version": "\u003e= 0.5.0, \u003c 0.5.14"
            },
            {
              "status": "affected",
              "version": "\u003e= 0.6.0, \u003c 0.6.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-93",
              "description": "CWE-93: Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-77",
              "description": "CWE-77: Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-09T19:39:48.398Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ruby/net-imap/security/advisories/GHSA-hm49-wcqc-g2xg",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ruby/net-imap/security/advisories/GHSA-hm49-wcqc-g2xg"
        },
        {
          "name": "https://github.com/ruby/net-imap/releases/tag/v0.4.24",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ruby/net-imap/releases/tag/v0.4.24"
        },
        {
          "name": "https://github.com/ruby/net-imap/releases/tag/v0.5.14",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ruby/net-imap/releases/tag/v0.5.14"
        },
        {
          "name": "https://github.com/ruby/net-imap/releases/tag/v0.6.4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ruby/net-imap/releases/tag/v0.6.4"
        }
      ],
      "source": {
        "advisory": "GHSA-hm49-wcqc-g2xg",
        "discovery": "UNKNOWN"
      },
      "title": "net-imap: Command Injection via \"raw\" arguments to multiple commands"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-42257",
    "datePublished": "2026-05-09T19:39:48.398Z",
    "dateReserved": "2026-04-26T11:53:27.704Z",
    "dateUpdated": "2026-05-13T19:33:13.948Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}