CVE-2026-46556: Flaskbb

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

FlaskBB is a Forum Software written in Python using the micro framework Flask. Prior to version 2.2.1, a Server-Side Request Forgery (SSRF) vulnerability in get_image_info() allows any authenticated user to force the server to send HTTP requests to arbitrary internal endpoints, including cloud metadata services. This is a blind SSRF with confirmed internal port scanning and internal API triggering capabilities. Version 2.2.1 patches the issue.

Affected products

• Flaskbb Flaskbb: before 2.2.1 (fixed in 2.2.1)

Published 2026-07-21. Last modified 2026-07-23.