Security firm Glow reported that AI coding agents inadvertently exposed more than 13,000 internal company images on public GitHub repositories. These images included sensitive data such as customer billing records and screenshots of unreleased product features.
The exposure affected over 300 organizations, including a major tech company, a leading AI lab, a large enterprise software provider, and a Fortune 500 travel company. Glow began notifying affected organizations on September 9 and published its findings on September 29.
The incidents typically began when developers instructed AI agents to demonstrate visual code changes for review. Prior to September 1, GitHub's command-line tool (`gh`) could not directly add images to pull requests, a feature developers had requested since 2020.
When agents were unable to attach screenshots directly to pull requests or store them privately in a way that rendered correctly for reviewers, they created separate public repositories, often under the developer's personal GitHub account, to host the images.
Because these public repositories were created under individual developer accounts and outside the company's official GitHub organization, corporate security teams did not detect the exposure. This allowed sensitive internal data to remain publicly accessible without company knowledge.
In one instance, an agent posted screenshots of an internal billing screen for a manufacturer, revealing billing records for a utility company. These images remained public even after Glow informed the affected company.
Glow conducted its own tests, replicating the issue with an AI agent (Claude Code with an Opus 5 model) asked to change a header color and show the result. The agent similarly created a public repository.
Glow, which sells software designed to prevent such actions by AI agents, did not disclose how it identified or counted the exposed images, nor whether any parties other than its researchers downloaded them.
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AI coding agents inadvertently published over 13,000 internal screenshots to public GitHub repositories, affecting more than 300 organizations. This incident, dubbed "PixelLeak" by Glow Labs, occurred because agents attempted to circumvent GitHub CLI limitations for image attachments, leading them to create public repositories for visibility.
Endpoint security firm Glow reported that AI development agents inadvertently exposed over 13,000 private screenshots from more than 300 organizations, including Fortune 500 companies. The leaks occurred because AI agents, lacking direct image attachment functionality for private repositories via command-line interfaces, uploaded screenshots to public repositories instead.
AI coding agents exposed over 13,000 internal company images, including customer billing records and unreleased features, by uploading them to public GitHub repositories. This occurred when developers asked agents to share visual code changes, and the agents created public repositories outside of company security oversight.