CVE-2026-56852 (GCVE-0-2026-56852)

Vulnerability from cvelistv5 – Published: 2026-07-21 19:18 – Updated: 2026-07-21 19:18
VLAI
Title
Infinite loop on invalid input in golang.org/x/text
Summary
A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.
Severity
No CVSS data available.
CWE
  • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
Go
References
Impacted products
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/text/unicode/norm",
          "product": "golang.org/x/text/unicode/norm",
          "programRoutines": [
            {
              "name": "nextComposed"
            },
            {
              "name": "Form.Append"
            },
            {
              "name": "Form.AppendString"
            },
            {
              "name": "Form.Bytes"
            },
            {
              "name": "Form.FirstBoundary"
            },
            {
              "name": "Form.FirstBoundaryInString"
            },
            {
              "name": "Form.IsNormal"
            },
            {
              "name": "Form.IsNormalString"
            },
            {
              "name": "Form.LastBoundary"
            },
            {
              "name": "Form.NextBoundary"
            },
            {
              "name": "Form.NextBoundaryInString"
            },
            {
              "name": "Form.Properties"
            },
            {
              "name": "Form.PropertiesString"
            },
            {
              "name": "Form.QuickSpan"
            },
            {
              "name": "Form.QuickSpanString"
            },
            {
              "name": "Form.Span"
            },
            {
              "name": "Form.SpanString"
            },
            {
              "name": "Form.String"
            },
            {
              "name": "Form.Transform"
            },
            {
              "name": "Iter.Init"
            },
            {
              "name": "Iter.InitString"
            },
            {
              "name": "Iter.Next"
            },
            {
              "name": "Iter.Seek"
            },
            {
              "name": "normReader.Read"
            },
            {
              "name": "normWriter.Write"
            }
          ],
          "vendor": "golang.org/x/text",
          "versions": [
            {
              "lessThan": "0.39.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-835: Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-21T19:18:59.951Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/80142"
        },
        {
          "url": "https://go.dev/cl/794100"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5970"
        }
      ],
      "title": "Infinite loop on invalid input in golang.org/x/text"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-56852",
    "datePublished": "2026-07-21T19:18:59.951Z",
    "dateReserved": "2026-06-23T15:10:49.352Z",
    "dateUpdated": "2026-07-21T19:18:59.951Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-56852",
      "date": "2026-07-22",
      "epss": "0.00222",
      "percentile": "0.12833"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-56852\",\"sourceIdentifier\":\"security@golang.org\",\"published\":\"2026-07-21T20:17:02.867\",\"lastModified\":\"2026-07-21T20:17:02.867\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.\"}],\"affected\":[{\"source\":\"security@golang.org\",\"affectedData\":[{\"vendor\":\"golang.org/x/text\",\"product\":\"golang.org/x/text/unicode/norm\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://pkg.go.dev\",\"packageName\":\"golang.org/x/text/unicode/norm\",\"programRoutines\":[{\"name\":\"nextComposed\"},{\"name\":\"Form.Append\"},{\"name\":\"Form.AppendString\"},{\"name\":\"Form.Bytes\"},{\"name\":\"Form.FirstBoundary\"},{\"name\":\"Form.FirstBoundaryInString\"},{\"name\":\"Form.IsNormal\"},{\"name\":\"Form.IsNormalString\"},{\"name\":\"Form.LastBoundary\"},{\"name\":\"Form.NextBoundary\"},{\"name\":\"Form.NextBoundaryInString\"},{\"name\":\"Form.Properties\"},{\"name\":\"Form.PropertiesString\"},{\"name\":\"Form.QuickSpan\"},{\"name\":\"Form.QuickSpanString\"},{\"name\":\"Form.Span\"},{\"name\":\"Form.SpanString\"},{\"name\":\"Form.String\"},{\"name\":\"Form.Transform\"},{\"name\":\"Iter.Init\"},{\"name\":\"Iter.InitString\"},{\"name\":\"Iter.Next\"},{\"name\":\"Iter.Seek\"},{\"name\":\"normReader.Read\"},{\"name\":\"normWriter.Write\"}],\"versions\":[{\"version\":\"0\",\"lessThan\":\"0.39.0\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://go.dev/cl/794100\",\"source\":\"security@golang.org\"},{\"url\":\"https://go.dev/issue/80142\",\"source\":\"security@golang.org\"},{\"url\":\"https://pkg.go.dev/vuln/GO-2026-5970\",\"source\":\"security@golang.org\"}]}}"
  }
}



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