Arbitrary inputs are included in errors without any escaping in net/textproto

概要

参考情報

• go.dev/issue/79346 · REPORT
• go.dev/cl/777060 · FIX
• groups.google.com/g/golang-announce/c/tKs3rmcBcKw · WEB
• pkg.go.dev/vuln/GO-2026-5039

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