{"id":"GO-2026-4982","aliases":["BIT-golang-2026-39823","CVE-2026-39823"],"title":"Bypass of meta content URL escaping causes XSS in html/template","titleSource":"OSV","descriptionSource":"OSV","description":"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XSS.","severity":"unknown","score":null,"published":"2026-05-07T19:21:40.000Z","modified":"2026-11-14T13:12:14.046Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Go","name":"stdlib","sources":[{"name":"OSV · GO-2026-4982","url":"https://osv.dev/vulnerability/GO-2026-4982"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.25.10"},{"introduced":"1.26.0-0"},{"fixed":"1.26.3"}],"type":"SEMVER"}],"versions":[],"fixed":["1.25.10","1.26.3"]}],"sourceAffected":[],"references":["https://go.dev/issue/78913","https://go.dev/cl/769920","https://groups.google.com/g/golang-announce/c/qcCIEXso47M"],"sources":[{"name":"OSV","id":"GO-2026-4982","modified":"2026-11-14T13:12:14.046820643Z","url":"https://osv.dev/vulnerability/GO-2026-4982"}],"assessments":[],"products":[],"remediation":[],"observedAt":"2026-11-14T15:23:07.074Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:15:34.962Z"},"coverage":[{"source":"NVD","status":"refresh-failed","attemptedAt":"2026-11-14T16:06:01.341Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-14T16:05:34.253Z","attemptedAt":"2026-11-14T16:05:34.253Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-14T16:05:34.257Z","attemptedAt":"2026-11-14T16:05:34.257Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-14T16:05:34.092Z","attemptedAt":"2026-11-14T16:05:34.092Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-39823","url":"https://www.first.org/epss/","probability":0.00314,"percentile":0.24739,"date":"2026-11-14","checkedAt":"2026-11-14T16:05:34.092Z"},{"source":"ENISA EUVD","id":"EUVD-2026-28424","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28424","modified":"May 8, 2026, 2:05:55 PM","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","checkedAt":"2026-11-14T16:05:34.257Z"},{"source":"GitHub Advisory Database","id":"GHSA-2283-wf8c-rw8r","url":"https://github.com/advisories/GHSA-2283-wf8c-rw8r","modified":"2026-05-13T18:30:34Z","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","checkedAt":"2026-11-14T16:05:34.253Z"}],"aiSummary":null}