ActiveFence Perplexity Comet Markdown/HTML Injection
Date: 2025-10
Affected: Perplexity Comet
Attack vector: prompt-injection
Category: research
Severity: Medium

ActiveFence disclosed prompt injection via markdown/HTML in Perplexity Comet - initially classified as not applicable, later reclassified after dispute.


Mitigations:

Architectural layers (MAESTRO):