Security Brief/Brief
Google details continuous defenses against indirect prompt injection in Workspace with Gemini
Google published a blog post describing indirect prompt injection as an evolving threat to users of complex AI applications such as Workspace with Gemini, and outlining its continuous defense approach. The post does not detail a specific protective step for small teams.
Indirect prompt injection (IPI) is an evolving threat vector targeting users of complex AI applications with multiple data sources, such as Workspace with Gemini, according to Google. The technique lets an attacker influence an LLM by injecting malicious instructions into the data or tools the LLM uses to complete a user's query. Google says this may even be possible without any input directly from the user. Google states that IPI is not a problem you solve and move on, and that it takes a sophisticated and comprehensive approach, continuously improving LLM resistance and launching capabilities with ever-improving defenses. The post mentions human red-teaming and automated red-teaming as part of its continuous approach.
What the reporting says
Each line below is stated by the page named above it, and only by that page.
Stated by security.googleblog.com
- Indirect prompt injection (IPI) is an evolving threat vector targeting users of complex AI applications with multiple data sources, such as Workspace with Gemini.
- This technique enables the attacker to influence the behavior of an LLM by injecting malicious instructions into the data or tools used by the LLM as it completes the user's query.
- This may even be possible without any input directly from the user.
- Google says it is continuously improving LLM resistance to IPI attacks and launching AI application capabilities with ever-improving defenses.
Our view
For small teams using AI assistants with access to multiple data sources, the practical takeaway is that prompt injection is a live risk, though the post offers no concrete defensive step beyond Google's own layered approach.
What the reporting says: Google states that indirect prompt injection is an evolving threat vector targeting users of complex AI applications with multiple data sources, such as Workspace with Gemini, and that it may be possible without any input directly from the user.
Sources
- Google Online Security BlogText stored 16 September 2026 · checked 16 September 2026
Found through monitored feeds: Google Online Security Blog. A feed address is how the desk finds a story, not the evidence for it — the sources listed above are the pages the facts were taken from.
How this story was checked. Written from the 1 page listed above, stored 16 September 2026; claims checked against that stored text on 16 September 2026.
What that means
- 4 of 4 reported statements were confirmed against the page that carries them; the rest were removed rather than published.
- Figures in the text were required to appear in the stored source text: yes. Identifiers: yes.
- The check reads stored text only: no claim rests on a fresh look that did not happen.
- Where the reporting was silent, the text says so instead of filling the gap.