{"success":true,"data":{"id":"from-unicode-tag-chars","label":"From header contains Unicode tag characters (U+E00xx) — ASCII smuggling / prompt injection","description":"The From header contains Unicode tag characters (U+E0020..U+E007F). Attackers embed them in the display name portion of the sender — `\"Support\\u{E0069}\\u{E0067}\\u{E006E}\\u{E006F}\\u{E0072}\\u{E0065}\" <spam@evil>` — so that an AI classifier reading `From: ${email.from}` sees smuggled instructions while the user sees a clean \"Support\" label. Third sibling of `body-unicode-tag-chars` and `subject-unicode-tag-chars`, covering the last of the three fields that `sanitizeAiInput` scrubs. Same detection regex, same +5 weight, same single-occurrence threshold — legit email never contains tag chars in the From header.","tier":"danger","category":"body","isThin":false}}