data/osv/GO-2026-4980.json

{
  "schema_version": "1.3.1",
  "id": "GO-2026-4980",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2026-39826"
  ],
  "summary": "Escaper bypass leads to XSS in html/template",
  "details": "If a trusted template author were to write a \u003cscript\u003e tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the \u003cscript\u003e block.",
  "affected": [
    {
      "package": {
        "name": "stdlib",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.25.10"
            },
            {
              "introduced": "1.26.0-0"
            },
            {
              "fixed": "1.26.3"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "html/template",
            "symbols": [
              "Template.Execute",
              "Template.ExecuteTemplate",
              "isJSType"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "REPORT",
      "url": "https://go.dev/issue/78981"
    },
    {
      "type": "FIX",
      "url": "https://go.dev/cl/771180"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
    }
  ],
  "credits": [
    {
      "name": "Mundur (https://github.com/M0nd0R)"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2026-4980",
    "review_status": "REVIEWED"
  }
}