CVE-2026-56852

A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://go.dev/cl/794100
https://go.dev/issue/80142
https://pkg.go.dev/vuln/GO-2026-5970

Configurations

No configuration.

History

24 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) Un norm.Iter puede entrar en un bucle infinito al procesar la entrada que contiene bytes UTF-8 no válidos.

Information

Published : 2026-07-21 20:17

Updated : 2026-10-24 19:10

NVD link : CVE-2026-56852

Mitre link : CVE-2026-56852

CVE.ORG link : CVE-2026-56852

JSON object : View

Products Affected

No product.

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

{"id": "CVE-2026-56852", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56852", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-23T13:26:14.918983Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@golang.org", "affectedData": [{"vendor": "golang.org/x/text", "product": "golang.org/x/text/unicode/norm", "versions": [{"status": "affected", "version": "0", "lessThan": "0.39.0", "versionType": "semver"}], "packageName": "golang.org/x/text/unicode/norm", "collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "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"}]}]}], "published": "2026-07-21T20:17:02.867", "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"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-835"}]}], "descriptions": [{"lang": "en", "value": "A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes."}, {"lang": "es", "value": "Un norm.Iter puede entrar en un bucle infinito al procesar la entrada que contiene bytes UTF-8 no v\u00e1lidos."}], "lastModified": "2026-10-24T19:10:00.127", "sourceIdentifier": "security@golang.org"}