--- title: Privacy risks of agentic oversharing on the Web | daily.dev description: Research from Brave introduces SPILLAGE, a framework for measuring 'agentic oversharing' — the tendency of LLM-based web agents to inadvertently expose... canonical: https://daily.dev/posts/privacy-risks-of-agentic-oversharing-on-the-web-pfn6uzis0 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Privacy risks of agentic oversharing on the Web | daily.dev og:description: Research from Brave introduces SPILLAGE, a framework for measuring 'agentic oversharing' — the tendency of LLM-based web agents to inadvertently expose... og:url: https://daily.dev/posts/privacy-risks-of-agentic-oversharing-on-the-web-pfn6uzis0 og:image: https://api.daily.dev/og/posts/pfn6uzIs0.png og:image:alt: Privacy risks of agentic oversharing on the Web og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Privacy risks of agentic oversharing on the Web **[Brave](https://daily.dev/sources/brave)** · 7 min read · 2 upvotes · 0 comments ## Summary Research from Brave introduces SPILLAGE, a framework for measuring 'agentic oversharing' — the tendency of LLM-based web agents to inadvertently expose sensitive user data to third-party websites while completing tasks. Testing across Amazon and eBay with 1,080 runs using Browser-Use and AutoGen (backed by GPT-4o, O3, O4-mini) found oversharing is pervasive, with behavioral oversharing dominating content oversharing. Critically, prompt-level privacy instructions are insufficient to stop it. Counterintuitively, removing task-irrelevant data from agent inputs improved task success rates by up to 17.9%, showing privacy and utility are complementary rather than in conflict. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [MosaicLeaks: Can your research agent keep a secret?](https://daily.dev/posts/mosaicleaks-can-your-research-agent-keep-a-secret--zuzoxsbo2) · Hugging Face · 2 upvotes · 0 comments - [Frontier AI models haemorrhage sensitive data](https://daily.dev/posts/frontier-ai-models-haemorrhage-sensitive-data-aky1ifa1f) · LeadDev · 0 upvotes · 0 comments - [Prompt Privacy Is the New Endpoint Security Problem](https://daily.dev/posts/prompt-privacy-is-the-new-endpoint-security-problem-avgurceo2) · Security Boulevard · 0 upvotes · 0 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#llm](https://daily.dev/tags/llm), [#privacy](https://daily.dev/tags/privacy) [View this post on daily.dev](https://daily.dev/posts/privacy-risks-of-agentic-oversharing-on-the-web-pfn6uzis0) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Privacy risks of agentic oversharing on the Web","url":"https://daily.dev/posts/privacy-risks-of-agentic-oversharing-on-the-web-pfn6uzis0","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/privacy-risks-of-agentic-oversharing-on-the-web-pfn6uzis0"},"datePublished":"2026-03-05T17:54:21.051Z","dateModified":"2026-03-15T08:03:15.138Z","description":"Research from Brave introduces SPILLAGE, a framework for measuring 'agentic oversharing' — the tendency of LLM-based web agents to inadvertently expose...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/37f1f15686fe159f9c091d35c5b25773?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/37f1f15686fe159f9c091d35c5b25773?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Brave","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Brave","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/12f1006df9d246a39d7fba20ab78bcba","url":"https://daily.dev/sources/brave"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/privacy-risks-of-agentic-oversharing-on-the-web-pfn6uzis0","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"ai-agents,llm,privacy","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Brave","item":"https://daily.dev/sources/brave"},{"@type":"ListItem","position":3,"name":"Privacy risks of agentic oversharing on the Web"}]} ```