{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42506", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-04-28T00:21:12.792Z", "datePublished": "2026-05-22T15:01:21.056Z", "dateUpdated": "2026-05-22T17:45:49.989Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-05-22T15:01:21.056Z"}, "title": "Invoking incorrect handling of namespaced elements in foreign content in golang.org/x/net/html", "descriptions": [{"lang": "en", "value": "Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering."}], "affected": [{"vendor": "golang.org/x/net", "product": "golang.org/x/net/html", "collectionURL": "https://pkg.go.dev", "packageName": "golang.org/x/net/html", "versions": [{"version": "0", "lessThan": "0.55.0", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "parser.parse"}, {"name": "Parse"}, {"name": "ParseFragment"}, {"name": "ParseFragmentWithOptions"}, {"name": "ParseWithOptions"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "references": [{"url": "https://go.dev/issue/79571"}, {"url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"}, {"url": "https://go.dev/cl/781700"}, {"url": "https://pkg.go.dev/vuln/GO-2026-5025"}], "credits": [{"lang": "en", "value": "ensy"}]}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-22T17:45:29.886387Z", "id": "CVE-2026-42506", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-22T17:45:49.989Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-42506", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-22T17:45:29.886387Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-22T17:45:46.046Z"}}], "cna": {"title": "Invoking incorrect handling of namespaced elements in foreign content in golang.org/x/net/html", "credits": [{"lang": "en", "value": "ensy"}], "affected": [{"vendor": "golang.org/x/net", "product": "golang.org/x/net/html", "versions": [{"status": "affected", "version": "0", "lessThan": "0.55.0", "versionType": "semver"}], "packageName": "golang.org/x/net/html", "collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "programRoutines": [{"name": "parser.parse"}, {"name": "Parse"}, {"name": "ParseFragment"}, {"name": "ParseFragmentWithOptions"}, {"name": "ParseWithOptions"}]}], "references": [{"url": "https://go.dev/issue/79571"}, {"url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"}, {"url": "https://go.dev/cl/781700"}, {"url": "https://pkg.go.dev/vuln/GO-2026-5025"}], "descriptions": [{"lang": "en", "value": "Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-05-22T15:01:21.056Z"}}}, "cveMetadata": {"cveId": "CVE-2026-42506", "state": "PUBLISHED", "dateUpdated": "2026-05-22T17:45:49.989Z", "dateReserved": "2026-04-28T00:21:12.792Z", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "datePublished": "2026-05-22T15:01:21.056Z", "assignerShortName": "Go"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:golang:net:*:*:*:*:*:go:*:*", "matchCriteriaId": "38C86E7B-A1CA-4670-B113-FC9585261F6F", "versionEndExcluding": "0.55.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering."}], "id": "CVE-2026-42506", "lastModified": "2026-05-29T19:06:20.453", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-05-22T16:16:20.803", "references": [{"source": "security@golang.org", "tags": ["Issue Tracking"], "url": "https://go.dev/cl/781700"}, {"source": "security@golang.org", "tags": ["Issue Tracking"], "url": "https://go.dev/issue/79571"}, {"source": "security@golang.org", "tags": ["Mailing List"], "url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"}, {"source": "security@golang.org", "tags": ["Vendor Advisory"], "url": "https://pkg.go.dev/vuln/GO-2026-5025"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.55.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "golang.org/x/net/html", "source": "cna", "vendor": "golang.org/x/net"}, "product": "net", "vendor": "golang"}], "created": "2026-05-22T16:30:40.167409+00:00", "updated": "2026-05-29T20:30:07.360346+00:00", "vendors": ["golang", "golang$PRODUCT$net"]}