{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-39823","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","state":"PUBLISHED","assignerShortName":"Go","dateReserved":"2026-04-07T18:13:03.527Z","datePublished":"2026-05-07T19:41:19.524Z","dateUpdated":"2026-05-08T14:05:55.152Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","shortName":"Go","dateUpdated":"2026-05-07T19:41:19.524Z"},"title":"Bypass of meta content URL escaping causes XSS in html/template","descriptions":[{"lang":"en","value":"CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS."}],"affected":[{"vendor":"Go standard library","product":"html/template","collectionURL":"https://pkg.go.dev","packageName":"html/template","versions":[{"version":"0","lessThan":"1.25.10","status":"affected","versionType":"semver"},{"version":"1.26.0-0","lessThan":"1.26.3","status":"affected","versionType":"semver"}],"programRoutines":[{"name":"tMetaContent"},{"name":"Template.Execute"},{"name":"Template.ExecuteTemplate"}],"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/78913"},{"url":"https://go.dev/cl/769920"},{"url":"https://groups.google.com/g/golang-announce/c/qcCIEXso47M"},{"url":"https://pkg.go.dev/vuln/GO-2026-4982"}],"credits":[{"lang":"en","value":"Samy Ghannad"}]},"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":"2026-05-08T14:05:34.310805Z","id":"CVE-2026-39823","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":"2026-05-08T14:05:55.152Z"}}]}}