CVE-2026-42157: Reconurge Flowsint

Medium severity, CVSS 5.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Flowsint is an open-source OSINT graph exploration tool designed for cybersecurity investigation, transparency, and verification. Prior to 1.2.3, a remote attacker can create a map node with a malicious label that contains arbitrary HTML. When the map tab is selected and a map node marker is selected, it will render the arbitrary HTML, potentially triggering stored XSS. This vulnerability is fixed in 1.2.3.

Affected products

• Reconurge Flowsint: before 1.2.3 (fixed in 1.2.3)

Published 2026-05-12. Last modified 2026-06-17.