ruby3.1, ruby3.3 — security advisory

{
  "id": "b470bc5fb0e871e7bb3af9b38c9c9f9af79e1059f0f73c095dce0ff239ebe140",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-47240",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-47240",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2026-47240",
    "products": [
      {
        "name": {
          "value": "ruby3.1",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.1.2-7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.2-7+deb12u1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.2-7+hurd.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.2-8",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.2-8.1~exp1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.2-8.3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.2-8.4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.2-8.5",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ruby3.3",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.3.8-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.3.8-2.1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.3.8-2.2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ruby3.3",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.3.8-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.3.8-2.1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.3.8-2.2",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2026-47240",
      "aliases": [
        "DEBIAN-CVE-2026-47240"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ruby3.1",
            "purl": "pkg:deb/debian/ruby3.1?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "3.1.2-7",
            "3.1.2-7+deb12u1",
            "3.1.2-7+hurd.1",
            "3.1.2-8",
            "3.1.2-8.1~exp1",
            "3.1.2-8.3",
            "3.1.2-8.4",
            "3.1.2-8.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47240.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ruby3.3",
            "purl": "pkg:deb/debian/ruby3.3?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "3.3.8-2",
            "3.3.8-2.1",
            "3.3.8-2.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47240.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ruby3.3",
            "purl": "pkg:deb/debian/ruby3.3?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "3.3.8-2",
            "3.3.8-2.1",
            "3.3.8-2.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47240.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T11:47:25.558088934Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-47240"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-47240"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-47240",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 450746,
  "published_at": "2026-06-22T21:16:24.543+00:00"
}