ChatGPT for Google Sheets is vulnerable to data exfiltration and phishing
promptarmor.com
May 31, 2026
4 min read
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63/100
Summary
ChatGPT for Google Sheets is vulnerable to data exfiltration and phishing overlay attacks, allowing unauthorized access to workbooks across a victim's account through indirect prompt injection. This vulnerability operates without the need for human approvals, even in settings where such approvals are mandated.
Key Takeaways
- ChatGPT for Google Sheets is vulnerable to data exfiltration and phishing overlay attacks triggered by indirect prompt injection from untrusted data sources.
- A single benign user query can lead to the exfiltration of multiple workbooks and unauthorized edits without requiring human approval.
- OpenAI has not responded to responsible disclosures regarding these vulnerabilities, and its documentation lacks details on the risks associated with model manipulation.
- The attack can execute external scripts that leverage user permissions, allowing attackers to control the ChatGPT sidebar and perform malicious activities.
Community Sentiment
Positives
- Containerization for local LLM workflows could enhance security by isolating AI tools from potential vulnerabilities, which is crucial as AI applications proliferate.
Concerns
- The vulnerability of ChatGPT for Google Sheets to data exfiltration highlights significant security concerns that developers seem to overlook, potentially exposing users to serious risks.
- There is a troubling lack of awareness among some AI developers regarding security implications, which could lead to widespread exploitation of vulnerabilities in AI tools.
- Prompt injection vulnerabilities may be fundamentally unsolvable, raising existential concerns about the security of AI systems in sensitive applications.
