{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "lang": "en-US",
    "publisher": {
      "category": "coordinator",
      "contact_details": "https://www.cisa.gov/report",
      "issuing_authority": "CISA",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "title": "SNOMED International Snowstorm reflected XSS",
    "tracking": {
      "current_release_date": "2026-08-04T16:59:44Z",
      "generator": {
        "engine": {
          "name": "VINCE-NT",
          "version": "1.15.0+build.101"
        }
      },
      "id": "VA-26-212-01",
      "initial_release_date": "2026-08-04T16:59:44Z",
      "status": "final",
      "version": "1.0.0",
      "revision_history": [
        {
          "number": "1.0.0",
          "summary": "Initial publication",
          "date": "2026-08-04T16:59:44Z"
        }
      ]
    },
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "text": "All information products included in [https://github.com/cisagov/CSAF/tree/develop/csaf_files/IT/white](https://github.com/cisagov/CSAF/tree/develop/csaf_files/IT/white) are provided \\\"as is\\\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see [https://us-cert.cisa.gov/tlp/](https://us-cert.cisa.gov/tlp/).",
        "title": "Legal Notice",
        "category": "legal_disclaimer"
      },
      {
        "text": "Worldwide",
        "title": "Countries and Areas Deployed",
        "category": "other"
      },
      {
        "text": "Information Technology",
        "title": "Critical Infrastructure Sectors",
        "category": "other"
      },
      {
        "text": "SNOMED International Snowstorm contains a reflected XSS vulnerability within the \"Web Route\" redirection functionality. The function does not properly validate user input, allowing an attacker to inject arbitrary JavaScript which will execute upon a target user navigating to a crafted, malicious link.",
        "title": "Risk Evaluation",
        "category": "summary"
      },
      {
        "text": "Fixed in 10.12.2. A backport fix is available in 10.9.3 for users unable to upgrade to 10.12.2.",
        "title": "Recommended Practices",
        "category": "general"
      },
      {
        "text": "United Kingdom",
        "title": "Company Headquarters Location",
        "category": "other"
      }
    ],
    "references": [
      {
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-212-01.json",
        "summary": "Vulnerability Advisory VA-26-212-01 CSAF",
        "category": "self"
      }
    ]
  },
  "product_tree": {
    "branches": [
      {
        "category": "vendor",
        "name": "SNOMED International",
        "branches": [
          {
            "category": "product_name",
            "name": "Snowstorm",
            "branches": [
              {
                "category": "product_version_range",
                "name": ">=7.0.0|<10.12.2",
                "product": {
                  "name": "SNOMED International Snowstorm >=7.0.0|<10.12.2",
                  "product_id": "CSAFPID-0001"
                }
              },
              {
                "category": "product_version",
                "name": "10.12.2",
                "product": {
                  "name": "SNOMED International Snowstorm 10.12.2",
                  "product_id": "CSAFPID-0002"
                }
              },
              {
                "category": "product_version",
                "name": "10.9.3",
                "product": {
                  "name": "SNOMED International Snowstorm 10.9.3",
                  "product_id": "CSAFPID-0003"
                }
              }
            ]
          }
        ]
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-66300",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
      },
      "notes": [
        {
          "category": "summary",
          "text": "SNOMED International Snowstorm contains a reflected XSS vulnerability within the \"Web Route\" redirection functionality. An attacker can inject arbitrary JavaScript which will execute upon a target user navigating to a crafted, malicious link. Fixed in 10.12.2 and 10.9.3.",
          "title": "Description"
        },
        {
          "category": "details",
          "title": "SSVC",
          "text": "SSVCv2/E:N/A:N/T:P/2026-08-04T16:06:49Z/"
        }
      ],
      "title": "SNOMED International Snowstorm reflected XSS",
      "product_status": {
        "known_affected": [
          "CSAFPID-0001"
        ],
        "fixed": [
          "CSAFPID-0002",
          "CSAFPID-0003"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "10.9.3 Fix",
          "url": "https://github.com/IHTSDO/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39"
        },
        {
          "category": "external",
          "summary": "10.12.2 Fix",
          "url": "https://github.com/IHTSDO/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6"
        },
        {
          "category": "external",
          "summary": "CVE-2026-66300",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-66300"
        },
        {
          "category": "external",
          "summary": "VA-26-212-01 CSAF",
          "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-212-01.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.0,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Fixed in 10.12.2",
          "url": "https://github.com/IHTSDO/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "date": "2026-07-24T00:00:00Z"
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in 10.12.2.",
          "url": "https://github.com/IHTSDO/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6",
          "product_ids": [
            "CSAFPID-0002"
          ],
          "date": "2026-07-24T00:00:00Z"
        },
        {
          "category": "vendor_fix",
          "details": "10.9.3 is a backport fix available for users unable to upgrade to 10.12.2.",
          "url": "https://github.com/IHTSDO/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39",
          "product_ids": [
            "CSAFPID-0003"
          ],
          "date": "2026-07-24T00:00:00Z"
        }
      ],
      "acknowledgments": [
        {
          "organization": "CISA",
          "names": [
            "Michael Milkovich"
          ]
        },
        {
          "organization": "CISA",
          "names": [
            "Karl Meister"
          ]
        }
      ],
      "release_date": "2026-07-24T00:00:00Z"
    }
  ]
}