CVE-2026-77087: Paperclipai Paperclip

Critical severity, CVSS 9.6. EPSS: 0.5% chance of exploitation in the next 30 days.

Paperclip before 0.3.1 in default local_trusted mode fails to validate Host headers, allowing attackers to execute arbitrary commands via DNS rebinding. An attacker can craft a malicious webpage that, when visited by a developer running Paperclip locally, uses DNS rebinding to make authenticated API requests and execute commands through the process adapter.

Affected products

• Paperclipai Paperclip: before 0.3.1 (fixed in 0.3.1)

Published 2026-08-21. Last modified 2026-09-24.