Fix Javascript regexp context tracking in html/template

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-56858 · Microsoft / collected KEV context

EUVD-2026-58512

GHSA-c974-w86c-vpfw

GO-2026-6091

BIT-golang-2026-56858

cve-program · CVE-2026-56858

• https://go.dev/issue/80435
• https://go.dev/cl/807100
• https://groups.google.com/g/golang-announce/c/94pEornpRlI
• https://pkg.go.dev/vuln/GO-2026-6091

euvd · EUVD-2026-58512

• https://go.dev/issue/80435
• https://go.dev/cl/807100
• https://groups.google.com/g/golang-announce/c/94pEornpRlI
• https://pkg.go.dev/vuln/GO-2026-6091

nvd · CVE-2026-56858

• https://go.dev/cl/807100
• https://go.dev/issue/80435
• https://groups.google.com/g/golang-announce/c/94pEornpRlI
• https://pkg.go.dev/vuln/GO-2026-6091

osv · GO-2026-6091

• https://go.dev/issue/80435
• https://go.dev/cl/807100
• https://groups.google.com/g/golang-announce/c/94pEornpRlI

• Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS. · Advisory content revised · 7 Nov 2026
• Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS. · Advisory content revised · 5 Nov 2026
• Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS. · Advisory content revised · 1 Nov 2026