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CVE-2026-66300

📛 CVE Title

SNOMED International Snowstorm reflected XSS

Description

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.

Overview

State
PUBLISHED
Assigner (CNA)
cisa-cg
CVSS severity
LOW
CVSS score
CVSS 2.3 / 10 2.3 2.3 / 10
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Effective score
2.3 / 10 LOW source: CNA overview
CWE(s)
CWE-79
Reserved
2026-07-24
Published
2026-08-04 18:51 UTC
Last updated
2026-08-04 18:58 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/66xxx/CVE-2026-66300.json

Affected products (1)

VendorProductVersionsPlatforms
SNOMED International Snowstorm 7.0.0 (affected), 10.12.2 (unaffected), 10.9.3 (unaffected)

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

  • url patch
  • url patch
  • url vdb-entry
  • url third-party-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-66300.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-66300",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-04T18:58:26.743125Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-04T18:58:36.936Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Snowstorm",
          "vendor": "SNOMED International",
          "versions": [
            {
              "lessThan": "10.12.2",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "10.12.2"
            },
            {
              "status": "unaffected",
              "version": "10.9.3"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Michael Milkovich, CISA"
        },
        {
          "lang": "en",
          "value": "Karl Meister, CISA"
        }
      ],
      "datePublic": "2026-07-24T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
            "version": "3.1"
          }
        },
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.3,
            "baseSeverity": "LOW",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        },
        {
          "other": {
            "content": {
              "id": "CVE-2026-66300",
              "options": [
                {
                  "Exploitation": "none"
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                },
                {
                  "Technical Impact": "partial"
                }
              ],
              "role": "CISA Coordinator",
              "timestamp": "2026-08-04T16:06:49.793385Z",
              "version": "2.0.3"
            },
            "type": "ssvc"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-04T18:51:27.626Z",
        "orgId": "9119a7d8-5eab-497f-8521-727c672e3725",
        "shortName": "cisa-cg"
      },
      "references": [
        {
          "name": "url",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/IHTSDO/snowstorm/commit/575b555695811110dafe2fcea7dd2fd7e4bcee39"
        },
        {
          "name": "url",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/IHTSDO/snowstorm/commit/b8061add427c930b3030549e77aa23ec5957ceb6"
        },
        {
          "name": "url",
          "tags": [
            "vdb-entry"
          ],
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-66300"
        },
        {
          "name": "url",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-212-01.json"
        }
      ],
      "title": "SNOMED International Snowstorm reflected XSS"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9119a7d8-5eab-497f-8521-727c672e3725",
    "assignerShortName": "cisa-cg",
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    "datePublished": "2026-08-04T18:51:27.626Z",
    "dateReserved": "2026-07-24T15:58:38.179Z",
    "dateUpdated": "2026-08-04T18:58:36.936Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}