Hidden PDF Text Hijacks Atlassian AI Assistant

Security researchers have uncovered a sneaky new threat targeting workplace artificial intelligence tools. A vulnerability in Atlassian systems allows hackers to hide malicious instructions inside PDF files that look completely empty to human readers. When an unsuspecting user uploads the document, the AI assistant reads the hidden text and quietly forwards sensitive Jira tickets and Confluence pages straight to the attacker.

This kind of indirect prompt injection poses a serious risk for teams relying on automated helpers to summarize work and find files. Because the malicious text stays invisible, employees have no easy way of knowing their private company data is leaking out during a routine search or summary request.

Atlassian and other software makers are rushing to patch these holes as artificial intelligence tools become standard in the workplace. Security experts advise teams to stay cautious when feeding external files into smart assistants until stronger defenses are ready.