{"id":"CVE-2026-27136","sourceIdentifier":"security@golang.org","published":"2026-05-22T16:16:20.087","lastModified":"2026-07-23T16:10:00.137","vulnStatus":"Analyzed","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."},{"lang":"es","value":"Procesar HTML arbitrario que luego se renderiza usando Render puede resultar en un árbol HTML inesperado. Esto puede ser aprovechado para ejecutar ataques XSS en aplicaciones que intentan sanear el HTML de entrada antes de renderizar."}],"affected":[{"source":"security@golang.org","affectedData":[{"vendor":"golang.org/x/net","product":"golang.org/x/net/html","defaultStatus":"unaffected","collectionURL":"https://pkg.go.dev","packageName":"golang.org/x/net/html","programRoutines":[{"name":"parser.parse"},{"name":"Parse"},{"name":"ParseFragment"},{"name":"ParseFragmentWithOptions"},{"name":"ParseWithOptions"}],"versions":[{"version":"0","lessThan":"0.55.0","versionType":"semver","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-22T16:59:35.355098Z","id":"CVE-2026-27136","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-1021"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:golang:net:*:*:*:*:*:go:*:*","versionEndExcluding":"0.55.0","matchCriteriaId":"38C86E7B-A1CA-4670-B113-FC9585261F6F"}]}]}],"references":[{"url":"https://go.dev/cl/781685","source":"security@golang.org","tags":["Issue Tracking"]},{"url":"https://go.dev/issue/79575","source":"security@golang.org","tags":["Issue Tracking"]},{"url":"https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8","source":"security@golang.org","tags":["Mailing List"]},{"url":"https://pkg.go.dev/vuln/GO-2026-5030","source":"security@golang.org","tags":["Vendor Advisory"]}]}