CVE-2026-42157

Description

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.

PUBLISHED Reserved 2026-04-24 | Published 2026-05-12 | Updated 2026-05-18 | Assigner GitHub_M

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

References

github.com/...owsint/security/advisories/GHSA-gj93-2vcq-729w exploit

github.com/...owsint/security/advisories/GHSA-gj93-2vcq-729w

cve.org (CVE-2026-42157)

nvd.nist.gov (CVE-2026-42157)

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