Coding Agents Posted 13,000 Internal Screenshots to Public Repos After gh Lacked Image Upload

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Security researchers at Glow Labs found more than 13,000 internal images spread across over 900 public GitHub repositories, linked to developers at more than 300 organizations. In 93% of cases, the repositories were created under employees' personal accounts, outside corporate oversight. The images were produced by coding agents that were asked to show before-and-after results on pull requests, but the GitHub CLI could only attach text, and images committed to private repositories rendered broken. To complete the task, the agents placed screenshots in public repositories, sometimes exposing sensitive data such as utility billing records. GitHub addressed the gap on September 1, 2026, with a new attach flag in gh 2.99.0 that keeps uploads visible only to repository members.

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