CVE-2026-56771: Samuelclay Newsblur

High severity, CVSS 8.5. EPSS: 0.4% chance of exploitation in the next 30 days.

NewsBlur before version 14.5.0 contains a server-side request forgery vulnerability in the add_url endpoint that allows authenticated users to make arbitrary server requests to internal networks by failing to filter private IP addresses. Attackers can exploit this to access localhost services and cloud metadata endpoints, enabling internal network scanning and sensitive data exfiltration.

Affected products

• Samuelclay Newsblur: before 14.5.0 (fixed in 14.5.0)

Published 2026-06-25. Last modified 2026-07-14.