AnalysisCybersecurityJuly 4, 2026

Possible prompt injection vulnerability reported in Anthropic's Claude

A Reddit user presents evidence of what appears to be literal prompt injection in Anthropic's Claude, with the model seemingly following injected instructions. The post details a conversation where Claude responds to hidden directives, raising security concerns.

1 source

Cybersecurity by email

Get an email when there's news on Cybersecurity

No news that day, no email.

More stories today

Open the live feed
Possible prompt injection vulnerability reported in Anthropic's Claude