CVE-2026-12821

MEDIUM 6.3

FlowiseAI Flowise S3 Document Loader S3.ts path traversal

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability was determined in FlowiseAI Flowise up to 3.1.2. The impacted element is an unknown function of the file packages/components/nodes/documentloaders/S3/S3.ts of the component S3 Document Loader. Executing a manipulation can lead to path traversal. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

CWE	CWE-22
Vendor	flowiseai
Product	flowise
Published	Jun 21, 2026

Stay Ahead of the Next One

Get instant alerts for flowiseai flowise

Be the first to know when new medium vulnerabilities affecting flowiseai flowise are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

FlowiseAI / Flowise

3.1.0 3.1.1 3.1.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/372611 vuldb.com: https://vuldb.com/vuln/372611/cti vuldb.com: https://vuldb.com/cve/CVE-2026-12821 vuldb.com: https://vuldb.com/submit/837578 github.com: https://github.com/dxz0069/softwareoverflow/blob/main/flowise_s3_loader_object_key_path_traversal_vulndb.md

Credits

🔍 ST4R (VulDB User) VulDB CNA Team