Security advisory

{
  "id": "315ddab2fce5cbf0fa587021e41a7235869498a1765a3ed4e5613f774800f950",
  "url": "https://osv.dev/vulnerability/CVE-2016-6263",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-6263",
    "summary": "The stringprep_utf8_nfkc_normalize function in lib/nfkc.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted UTF-8 data.",
    "evidence": "osv:CVE-2016-6263",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2016-6263",
      "aliases": [
        "CVE-2016-6263"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://cgit.git.savannah.gnu.org/cgit/libidn.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1fbee57ef3c72db2206dd87e4162108b2f425555"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "1fbee57ef3c72db2206dd87e4162108b2f425555"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-6263.json"
          }
        }
      ],
      "modified": "2026-11-01T02:30:42.108942707Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.gnu.org/archive/html/help-libidn/2016-07/msg00009.html",
        "https://security.gentoo.org/glsa/201908-06"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:gnu:libidn:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "gnu:libidn",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "1.32"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.33"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2016-6263",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 442638,
  "published_at": "2016-09-07T20:59:06.873+00:00"
}