{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.12.8"
              },
              {
                "introduced": "5.13.0"
              },
              {
                "fixed": "5.13.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "8bf5af6fe227bbf8ead15e60644b7ddbf345d623"
            },
            {
              "fixed": "144335f15d7730d7fc833122c8c8a6f1906fea9f"
            },
            {
              "fixed": "50d73a44d136f0dd2828fa11f69f1fe1fc5583f7"
            },
            {
              "fixed": "8e18e279d8ce761c21f4f67bbd06a1bff804d297"
            },
            {
              "fixed": "ecf34a4e2ccbe085e6ceff0253595b24d5ecb4aa"
            }
          ],
          "repo": "https://github.com/yamcs/yamcs",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9272-wg2r-7xmx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55566.json"
  },
  "details": "Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs processes attacker-controlled data from the /ext URL route in yamcs-web/src/main/webapp/projects/webapp/src/app/core/routes/extension.matcher.ts, extension.component.ts, and app.component.ts without checking registered plugin IDs before DOM rendering through innerHTML. A crafted URL can execute JavaScript when opened by a user. The script can read data available to the Yamcs web application and perform actions in the user context. This issue is fixed in versions 5.12.8 and 5.13.2.",
  "id": "CVE-2026-55566",
  "modified": "2026-09-10T03:30:36.896680360Z",
  "published": "2026-08-28T17:31:39.197Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55566.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55566"
    },
    {
      "type": "FIX",
      "url": "https://github.com/yamcs/yamcs/commit/8e18e279d8ce761c21f4f67bbd06a1bff804d297"
    },
    {
      "type": "FIX",
      "url": "https://github.com/yamcs/yamcs/commit/ecf34a4e2ccbe085e6ceff0253595b24d5ecb4aa"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Yamcs: DOM XSS in Extension Routing"
}