{"schema_version":"1.3.1","id":"GO-2026-4980","modified":"2026-05-07T19:21:40Z","published":"2026-05-07T19:21:40Z","aliases":["CVE-2026-39826"],"summary":"Escaper bypass leads to XSS in html/template","details":"If a trusted template author were to write a \u003cscript\u003e tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the \u003cscript\u003e block.","affected":[{"package":{"name":"stdlib","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.25.10"},{"introduced":"1.26.0-0"},{"fixed":"1.26.3"}]}],"ecosystem_specific":{"imports":[{"path":"html/template","symbols":["Template.Execute","Template.ExecuteTemplate","isJSType"]}]}}],"references":[{"type":"REPORT","url":"https://go.dev/issue/78981"},{"type":"FIX","url":"https://go.dev/cl/771180"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/qcCIEXso47M"}],"credits":[{"name":"Mundur (https://github.com/M0nd0R)"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4980","review_status":"REVIEWED"}}