CVE-2026-42159

Flowsint: Stored XSS in description of node

Published May 14, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
Flowsint is an open-source OSINT graph exploration tool designed for cybersecurity investigation, transparency, and verification. Prior to 1.2.3, Flowsint allows a user to create investigations, which are used to manage sketches and analyses. Sketches have controllable graphs, which are comprised of nodes and relationships. The sketches contain information on an OSINT target (usernames, websites, etc) within these nodes and relationships. A remote attacker can create a node with a malicious description that contains arbitrary HTML. When the node is selected, it will render the arbitrary HTML, potentially triggering stored XSS. This vulnerability is fixed in 1.2.3.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Flowsint
Flowsint flowsint
CPEs cpe:2.3:a:reconurge:flowsint:*:*:*:*:*:*:*:* cpe:2.3:a:flowsint:flowsint:*:*:*:*:*:*:*:*
Vendors & Products Flowsint
Flowsint flowsint
Type Values Removed Values Added
CPEs cpe:2.3:a:reconurge:flowsint:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Reconurge
Reconurge flowsint
Vendors & Products Reconurge
Reconurge flowsint
Type Values Removed Values Added
Description Flowsint is an open-source OSINT graph exploration tool designed for cybersecurity investigation, transparency, and verification. Prior to 1.2.3, Flowsint allows a user to create investigations, which are used to manage sketches and analyses. Sketches have controllable graphs, which are comprised of nodes and relationships. The sketches contain information on an OSINT target (usernames, websites, etc) within these nodes and relationships. A remote attacker can create a node with a malicious description that contains arbitrary HTML. When the node is selected, it will render the arbitrary HTML, potentially triggering stored XSS. This vulnerability is fixed in 1.2.3.
Title Flowsint: Stored XSS in description of node
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 14, 2026, 6:21 PM
Reserved
Apr 24, 2026, 5:15 PM
Status
Analyzed
Published
May 14, 2026, 4:16 PM
Modified
Oct 26, 2026, 2:10 PM