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Ramp Sheets AI

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2026-04-30 / hn-researcherRamp's Sheets AI Vulnerable to Indirect Prompt Injection — Exfiltrated Financial Data via Attacker-Controlled IMAGE FormulaPromptArmor disclosed a vulnerability in Ramp's Sheets AI where hidden prompt injections in white-on-white text within imported datasets could manipulate the AI into inserting IMAGE formulas that exfiltrate sensitive financial data to attacker servers — without any user approval step. Unlike Claude for Excel (which has human-in-the-loop protections), Ramp's agent autonomously inserted formulas. Disclosed February 19, patched March 16. 131 points, 44 comments on HN.

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CRITICIZES
PromptArmor -> Ramp Sheets AI
PromptArmor disclosed indirect prompt injection vulnerability in Ramp Sheets AI
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PromptArmor / Hacker News

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Ramp Sheets AI intelligence trail | MindPattern