Google Jules is Vulnerable To Invisible Prompt Injection
highnewsLLM-Specific
securitysafety
Source: Embrace The RedAugust 15, 2025
Summary
Google's Gemini AI models, including the Jules product, are vulnerable to invisible prompt injection (tricking an AI by hiding instructions in its input using invisible Unicode characters that the AI interprets as commands). This vulnerability was reported to Google over a year ago but remains unfixed at the model and API (application programming interface, the interface developers use to access the AI) level, affecting all applications built on Gemini, including Google's own products.
Classification
Attack Type
Prompt Injection
Attack SophisticationModerate
Impact (CIA+S)
integritysafety
Affected Vendors
Google
Related Issues
Original source: https://embracethered.com/blog/posts/2025/google-jules-invisible-prompt-injection/
First tracked: February 12, 2026 at 02:20 PM
Classified by LLM (prompt v3) · confidence: 92%