fix: prevent image-based data exfiltration in chat markdown#42
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fix: prevent image-based data exfiltration in chat markdown#42
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Replace <img> rendering with <a> tag to prevent automatic HTTP requests from AI-generated markdown image syntax. This mitigates prompt injection attacks that could exfiltrate sensitive data via image URLs. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
| {children} | ||
| </td> | ||
| ), | ||
| img: ({ src, alt }) => ( |
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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
mm-zacharydavison
approved these changes
Mar 12, 2026
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Why
react-markdown renders markdown image syntax (
) as ![]()
tags, which automatically fire HTTP requests on render. If an AI is manipulated via prompt injection to output a
malicious image URL, sensitive data visible on screen could be exfiltrated to an external server without any user interaction.
What
Convert![]()
tag rendering to tags in the MarkdownContent component to prevent automatic HTTP requests.
How