--- title: GitHub AI agent leaks private repositories via prompt... description: Security researchers at Noma Security discovered a prompt injection attack called GitLost that can trick GitHub's preview Agentic Workflows into leaking... canonical: https://daily.dev/posts/github-ai-agent-leaks-private-repositories-via-prompt-injection-attack-rd9immbqn twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: GitHub AI agent leaks private repositories via prompt injection attack | daily.dev og:description: Security researchers at Noma Security discovered a prompt injection attack called GitLost that can trick GitHub's preview Agentic Workflows into leaking... og:url: https://daily.dev/posts/github-ai-agent-leaks-private-repositories-via-prompt-injection-attack-rd9immbqn og:image: https://api.daily.dev/og/posts/Rd9IMMBqn.png og:image:alt: GitHub AI agent leaks private repositories via prompt injection attack 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. # GitHub AI agent leaks private repositories via prompt injection attack **[CSO Online](https://daily.dev/sources/csoonline)** · 4 min read · 1 upvotes · 0 comments ## Summary Security researchers at Noma Security discovered a prompt injection attack called GitLost that can trick GitHub's preview Agentic Workflows into leaking private repository contents publicly. An unauthenticated attacker submits a crafted GitHub Issue to a public repo; if the AI agent has read access to private repositories in the same organization, it retrieves and posts sensitive data in a public comment. The attack bypasses GitHub's prompt-based guardrails with minor wording changes and requires no stolen credentials or malware. Experts highlight a deeper architectural problem: AI agents operate on broad service account permissions rather than user-scoped permissions, creating invisible trust boundary gaps. Recommended mitigations include explicit repository whitelists, treating all user inputs as untrusted before reaching the LLM, and having an emergency kill-switch for rogue agents. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [GitLost: GitHub's AI agent leaks private repos when asked](https://daily.dev/posts/gitlost-github-s-ai-agent-leaks-private-repos-when-asked-qlzfcubqe) · The Next Web · 2 upvotes · 1 comments - [‘GitLost’ Flaw Lets Attackers Trick GitHub AI Agent Into Leaking Private Repos](https://daily.dev/posts/gitlost-flaw-lets-attackers-trick-github-ai-agent-into-leaking-private-repos-h2sgta49s) · DevOps.com · 0 upvotes · 0 comments - ['GitLost' Flaw Leaks Private Data from GitHub's Agentic Workflows](https://daily.dev/posts/gitlost-flaw-leaks-private-data-from-github-s-agentic-workflows-jty8eoyaf) · Dark Reading · 0 upvotes · 0 comments - [GitHub AI agent leaks private repos when asked nicely](https://daily.dev/posts/github-ai-agent-leaks-private-repos-when-asked-nicely-gkw3rhodd) · The Register · 89 upvotes · 24 comments --- Tags: [#security](https://daily.dev/tags/security), [#github](https://daily.dev/tags/github), [#ai-agents](https://daily.dev/tags/ai-agents), [#prompt-injection](https://daily.dev/tags/prompt-injection) [View this post on daily.dev](https://daily.dev/posts/github-ai-agent-leaks-private-repositories-via-prompt-injection-attack-rd9immbqn) ```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":"GitHub AI agent leaks private repositories via prompt injection attack","url":"https://daily.dev/posts/github-ai-agent-leaks-private-repositories-via-prompt-injection-attack-rd9immbqn","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/github-ai-agent-leaks-private-repositories-via-prompt-injection-attack-rd9immbqn"},"datePublished":"2026-07-08T12:16:28.302Z","dateModified":"2026-07-08T12:16:48.765Z","description":"Security researchers at Noma Security discovered a prompt injection attack called GitLost that can trick GitHub's preview Agentic Workflows into leaking...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0db7d56a733b1f70cd79c7cc5730caf8?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0db7d56a733b1f70cd79c7cc5730caf8?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"CSO Online","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":"CSO Online","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/98667e4b5cac46cf9c470819c6cf71cd","url":"https://daily.dev/sources/csoonline"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/github-ai-agent-leaks-private-repositories-via-prompt-injection-attack-rd9immbqn","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,github,ai-agents,prompt-injection","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"CSO Online","item":"https://daily.dev/sources/csoonline"},{"@type":"ListItem","position":3,"name":"GitHub AI agent leaks private repositories via prompt injection attack"}]} ```